665911374 has 16 divisors (see below), whose sum is σ = 1338725712. Its totient is φ = 220819968.

The previous prime is 665911357. The next prime is 665911423. The reversal of 665911374 is 473119566.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286369 + ... + 288684.

It is an arithmetic number, because the mean of its divisors is an integer number (83670357).

Almost surely, 2^665911374 is an apocalyptic number.

665911374 is an abundant number, since it is smaller than the sum of its proper divisors (672814338).

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

665911374 is a wasteful number, since it uses less digits than its factorization.

665911374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575251.

The product of its digits is 136080, while the sum is 42.

The square root of 665911374 is about 25805.2586501279. The cubic root of 665911374 is about 873.2504356112.

The spelling of 665911374 in words is "six hundred sixty-five million, nine hundred eleven thousand, three hundred seventy-four".