511980666 has 16 divisors (see below), whose sum is σ = 1024488000. Its totient is φ = 170572448.

The previous prime is 511980659. The next prime is 511980671. The reversal of 511980666 is 666089115.

It is a happy 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, 8691 + ... + 33158.

It is an arithmetic number, because the mean of its divisors is an integer number (64030500).

Almost surely, 2^511980666 is an apocalyptic number.

511980666 is an abundant number, since it is smaller than the sum of its proper divisors (512507334).

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

511980666 is a wasteful number, since it uses less digits than its factorization.

511980666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43893.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 511980666 is about 22626.9897688579. The cubic root of 511980666 is about 799.9899300816.

The spelling of 511980666 in words is "five hundred eleven million, nine hundred eighty thousand, six hundred sixty-six".