665914416 has 20 divisors (see below), whose sum is σ = 1720279032. Its totient is φ = 221971456.

The previous prime is 665914411. The next prime is 665914421. The reversal of 665914416 is 614419566.

It is an interprime number because it is at equal distance from previous prime (665914411) and next prime (665914421).

It is not an unprimeable number, because it can be changed into a prime (665914411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6936561 + ... + 6936656.

Almost surely, 2^665914416 is an apocalyptic number.

It is an amenable number.

665914416 is an abundant number, since it is smaller than the sum of its proper divisors (1054364616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665914416 is a wasteful number, since it uses less digits than its factorization.

665914416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13873228 (or 13873222 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 665914416 is about 25805.3175915353. The cubic root of 665914416 is about 873.2517653296.

The spelling of 665914416 in words is "six hundred sixty-five million, nine hundred fourteen thousand, four hundred sixteen".