657000696561 has 8 divisors (see below), whose sum is σ = 955637376864. Its totient is φ = 398182240320.

The previous prime is 657000696523. The next prime is 657000696637. The reversal of 657000696561 is 165696000756.

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

It is not a de Polignac number, because 657000696561 - 2¹³ = 657000688369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (657000696511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9954555976 + ... + 9954556041.

It is an arithmetic number, because the mean of its divisors is an integer number (119454672108).

Almost surely, 2^657000696561 is an apocalyptic number.

It is an amenable number.

657000696561 is a deficient number, since it is larger than the sum of its proper divisors (298636680303).

657000696561 is a wasteful number, since it uses less digits than its factorization.

657000696561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19909112031.

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 657000696561 in words is "six hundred fifty-seven billion, six hundred ninety-six thousand, five hundred sixty-one".