665407246144 has 28 divisors (see below), whose sum is σ = 1320746558400. Its totient is φ = 332620711808.

The previous prime is 665407246109. The next prime is 665407246177. The reversal of 665407246144 is 441642704566.

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, 1036264 + ... + 1550695.

Almost surely, 2^665407246144 is an apocalyptic number.

665407246144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

665407246144 is a deficient number, since it is larger than the sum of its proper divisors (655339312256).

665407246144 is a wasteful number, since it uses less digits than its factorization.

665407246144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590990 (or 2590980 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 665407246144 in words is "six hundred sixty-five billion, four hundred seven million, two hundred forty-six thousand, one hundred forty-four".