1662506460 has 144 divisors (see below), whose sum is σ = 5362025760. Its totient is φ = 415756800.

The previous prime is 1662506431. The next prime is 1662506497. The reversal of 1662506460 is 646052661.

It is a happy number.

1662506460 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 5 + 0 + 646 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 343014 + ... + 347826.

It is an arithmetic number, because the mean of its divisors is an integer number (37236290).

Almost surely, 2^1662506460 is an apocalyptic number.

1662506460 is a gapful number since it is divisible by the number (10) 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 1662506460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2681012880).

1662506460 is an abundant number, since it is smaller than the sum of its proper divisors (3699519300).

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

1662506460 is a wasteful number, since it uses less digits than its factorization.

1662506460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948 (or 4943 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1662506460 is about 40773.8452932759. The cubic root of 1662506460 is about 1184.6437854702.

The spelling of 1662506460 in words is "one billion, six hundred sixty-two million, five hundred six thousand, four hundred sixty".