666511368 has 32 divisors (see below), whose sum is σ = 1667239200. Its totient is φ = 222042368.

The previous prime is 666511337. The next prime is 666511369. The reversal of 666511368 is 863115666.

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 not an unprimeable number, because it can be changed into a prime (666511369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40480 + ... + 54512.

It is an arithmetic number, because the mean of its divisors is an integer number (52101225).

Almost surely, 2^666511368 is an apocalyptic number.

It is an amenable number.

666511368 is an abundant number, since it is smaller than the sum of its proper divisors (1000727832).

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

666511368 is a wasteful number, since it uses less digits than its factorization.

666511368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16021 (or 16017 counting only the distinct ones).

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

The square root of 666511368 is about 25816.8814538085. The cubic root of 666511368 is about 873.5126265277.

The spelling of 666511368 in words is "six hundred sixty-six million, five hundred eleven thousand, three hundred sixty-eight".