660232620 has 120 divisors (see below), whose sum is σ = 2090734800. Its totient is φ = 174400128.

The previous prime is 660232603. The next prime is 660232697. The reversal of 660232620 is 26232066.

It is a happy number.

660232620 is a `hidden beast` number, since 6 + 6 + 0 + 2 + 32 + 620 = 666.

It is a super-2 number, since 2×660232620² = 871814225024128800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 174711 + ... + 178449.

It is an arithmetic number, because the mean of its divisors is an integer number (17422790).

Almost surely, 2^660232620 is an apocalyptic number.

660232620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660232620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045367400).

660232620 is an abundant number, since it is smaller than the sum of its proper divisors (1430502180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660232620 is a wasteful number, since it uses less digits than its factorization.

660232620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869 (or 3858 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 660232620 is about 25694.9921190881. The cubic root of 660232620 is about 870.7610463159.

Adding to 660232620 its reverse (26232066), we get a palindrome (686464686).

The spelling of 660232620 in words is "six hundred sixty million, two hundred thirty-two thousand, six hundred twenty".