665455416 has 16 divisors (see below), whose sum is σ = 1663638600. Its totient is φ = 221818464.

The previous prime is 665455409. The next prime is 665455423. The reversal of 665455416 is 614554566.

It is an interprime number because it is at equal distance from previous prime (665455409) and next prime (665455423).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13863631 + ... + 13863678.

Almost surely, 2^665455416 is an apocalyptic number.

It is an amenable number.

665455416 is an abundant number, since it is smaller than the sum of its proper divisors (998183184).

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

665455416 is a wasteful number, since it uses less digits than its factorization.

665455416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27727318 (or 27727314 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The square root of 665455416 is about 25796.4225426705. The cubic root of 665455416 is about 873.0510815387.

The spelling of 665455416 in words is "six hundred sixty-five million, four hundred fifty-five thousand, four hundred sixteen".