665774136 has 48 divisors (see below), whose sum is σ = 1898044200. Its totient is φ = 210244032.

The previous prime is 665774119. The next prime is 665774149. The reversal of 665774136 is 631477566.

665774136 is a `hidden beast` number, since 6 + 6 + 577 + 41 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 665774091 and 665774100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241971 + ... + 244706.

Almost surely, 2^665774136 is an apocalyptic number.

It is an amenable number.

665774136 is an abundant number, since it is smaller than the sum of its proper divisors (1232270064).

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

665774136 is a wasteful number, since it uses less digits than its factorization.

665774136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486708 (or 486701 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 665774136 is about 25802.5994039360. The cubic root of 665774136 is about 873.1904419535.

The spelling of 665774136 in words is "six hundred sixty-five million, seven hundred seventy-four thousand, one hundred thirty-six".