657600641 has 4 divisors (see below), whose sum is σ = 671592192. Its totient is φ = 643609092.

The previous prime is 657600637. The next prime is 657600653. The reversal of 657600641 is 146006756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 657600641 - 2² = 657600637 is a prime.

It is a super-2 number, since 2×657600641² = 864877206087221762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657600631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6995705 + ... + 6995798.

It is an arithmetic number, because the mean of its divisors is an integer number (167898048).

Almost surely, 2^657600641 is an apocalyptic number.

It is an amenable number.

657600641 is a deficient number, since it is larger than the sum of its proper divisors (13991551).

657600641 is a wasteful number, since it uses less digits than its factorization.

657600641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13991550.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 657600641 is about 25643.7251779066. The cubic root of 657600641 is about 869.6024259095.

The spelling of 657600641 in words is "six hundred fifty-seven million, six hundred thousand, six hundred forty-one".