657788425 has 12 divisors (see below), whose sum is σ = 932180416. Its totient is φ = 451054800.

The previous prime is 657788423. The next prime is 657788441. The reversal of 657788425 is 524887756.

It is not a de Polignac number, because 657788425 - 2¹ = 657788423 is a prime.

It is a super-2 number, since 2×657788425² = 865371224127961250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657788423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1879221 + ... + 1879570.

Almost surely, 2^657788425 is an apocalyptic number.

It is an amenable number.

657788425 is a deficient number, since it is larger than the sum of its proper divisors (274391991).

657788425 is a wasteful number, since it uses less digits than its factorization.

657788425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758808 (or 3758803 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 52.

The square root of 657788425 is about 25647.3863190774. The cubic root of 657788425 is about 869.6851923945.

The spelling of 657788425 in words is "six hundred fifty-seven million, seven hundred eighty-eight thousand, four hundred twenty-five".