657421516 has 12 divisors (see below), whose sum is σ = 1150685032. Its totient is φ = 328654368.

The previous prime is 657421507. The next prime is 657421517. The reversal of 657421516 is 615124756.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (657421517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22951 + ... + 42913.

Almost surely, 2^657421516 is an apocalyptic number.

It is an amenable number.

657421516 is a deficient number, since it is larger than the sum of its proper divisors (493263516).

657421516 is a wasteful number, since it uses less digits than its factorization.

657421516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28200 (or 28198 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 657421516 is about 25640.2323702419. The cubic root of 657421516 is about 869.5234612258.

The spelling of 657421516 in words is "six hundred fifty-seven million, four hundred twenty-one thousand, five hundred sixteen".