511561966 has 16 divisors (see below), whose sum is σ = 808189200. Its totient is φ = 242180928.

The previous prime is 511561957. The next prime is 511561987. The reversal of 511561966 is 669165115.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101236 + ... + 106168.

It is an arithmetic number, because the mean of its divisors is an integer number (50511825).

Almost surely, 2^511561966 is an apocalyptic number.

511561966 is a deficient number, since it is larger than the sum of its proper divisors (296627234).

511561966 is a wasteful number, since it uses less digits than its factorization.

511561966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7683.

The product of its digits is 48600, while the sum is 40.

The square root of 511561966 is about 22617.7356514749. The cubic root of 511561966 is about 799.7717921994.

It can be divided in two parts, 5115 and 61966, that added together give a square (67081 = 259²).

The spelling of 511561966 in words is "five hundred eleven million, five hundred sixty-one thousand, nine hundred sixty-six".