660055501 has 8 divisors (see below), whose sum is σ = 761400000. Its totient is φ = 560473728.

The previous prime is 660055499. The next prime is 660055511. The reversal of 660055501 is 105550066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660055501 - 2¹ = 660055499 is a prime.

It is a super-2 number, since 2×660055501² = 871346528800722002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660055501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660055511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439876 + ... + 441373.

It is an arithmetic number, because the mean of its divisors is an integer number (95175000).

Almost surely, 2^660055501 is an apocalyptic number.

It is an amenable number.

660055501 is a deficient number, since it is larger than the sum of its proper divisors (101344499).

660055501 is a wasteful number, since it uses less digits than its factorization.

660055501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881363.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 660055501 is about 25691.5453213698. The cubic root of 660055501 is about 870.6831737022.

The spelling of 660055501 in words is "six hundred sixty million, fifty-five thousand, five hundred one".