7717391066 has 32 divisors (see below), whose sum is σ = 15060031488. Its totient is φ = 2876045040.

The previous prime is 7717391029. The next prime is 7717391083. The reversal of 7717391066 is 6601937177.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 7717391066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1085870 + ... + 1092953.

It is an arithmetic number, because the mean of its divisors is an integer number (470625984).

Almost surely, 2^7717391066 is an apocalyptic number.

7717391066 is a deficient number, since it is larger than the sum of its proper divisors (7342640422).

7717391066 is a wasteful number, since it uses less digits than its factorization.

7717391066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178866.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 7717391066 is about 87848.6827789694. The cubic root of 7717391066 is about 1976.1663625730.

The spelling of 7717391066 in words is "seven billion, seven hundred seventeen million, three hundred ninety-one thousand, sixty-six".