5111515666 has 16 divisors (see below), whose sum is σ = 7798936320. Its totient is φ = 2512234800.

The previous prime is 5111515663. The next prime is 5111515687. The reversal of 5111515666 is 6665151115.

It is a super-2 number, since 2×5111515666² = 52255184807526847112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5111515663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62946 + ... + 119101.

It is an arithmetic number, because the mean of its divisors is an integer number (487433520).

Almost surely, 2^5111515666 is an apocalyptic number.

5111515666 is a deficient number, since it is larger than the sum of its proper divisors (2687420654).

5111515666 is a wasteful number, since it uses less digits than its factorization.

5111515666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182289.

The product of its digits is 27000, while the sum is 37.

The square root of 5111515666 is about 71494.8646127818. The cubic root of 5111515666 is about 1722.5951973664.

The spelling of 5111515666 in words is "five billion, one hundred eleven million, five hundred fifteen thousand, six hundred sixty-six".