657429016 has 8 divisors (see below), whose sum is σ = 1232679420. Its totient is φ = 328714504.

The previous prime is 657428983. The next prime is 657429023. The reversal of 657429016 is 610924756.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×657429016² = 864425822157456512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 657429016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41089306 + ... + 41089321.

Almost surely, 2^657429016 is an apocalyptic number.

It is an amenable number.

657429016 is a deficient number, since it is larger than the sum of its proper divisors (575250404).

657429016 is a wasteful number, since it uses less digits than its factorization.

657429016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82178633 (or 82178629 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 657429016 is about 25640.3786243495. The cubic root of 657429016 is about 869.5267677808.

The spelling of 657429016 in words is "six hundred fifty-seven million, four hundred twenty-nine thousand, sixteen".