8151555666 has 16 divisors (see below), whose sum is σ = 16682253984. Its totient is φ = 2653994784.

The previous prime is 8151555631. The next prime is 8151555697. The reversal of 8151555666 is 6665551518.

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, 15797331 + ... + 15797846.

It is an arithmetic number, because the mean of its divisors is an integer number (1042640874).

Almost surely, 2^8151555666 is an apocalyptic number.

8151555666 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

8151555666 is an abundant number, since it is smaller than the sum of its proper divisors (8530698318).

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

8151555666 is a wasteful number, since it uses less digits than its factorization.

8151555666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31595225.

The product of its digits is 1080000, while the sum is 48.

The square root of 8151555666 is about 90285.9660523162. The cubic root of 8151555666 is about 2012.5507138745.

The spelling of 8151555666 in words is "eight billion, one hundred fifty-one million, five hundred fifty-five thousand, six hundred sixty-six".