75663666499 has 16 divisors (see below), whose sum is σ = 76472622720. Its totient is φ = 74859785280.

The previous prime is 75663666473. The next prime is 75663666509. The reversal of 75663666499 is 99466636657.

It is a cyclic number.

It is not a de Polignac number, because 75663666499 - 2¹⁹ = 75663142211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75663666469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51088839 + ... + 51090319.

It is an arithmetic number, because the mean of its divisors is an integer number (4779538920).

Almost surely, 2^75663666499 is an apocalyptic number.

75663666499 is a deficient number, since it is larger than the sum of its proper divisors (808956221).

75663666499 is a wasteful number, since it uses less digits than its factorization.

75663666499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850.

The product of its digits is 264539520, while the sum is 67.

The spelling of 75663666499 in words is "seventy-five billion, six hundred sixty-three million, six hundred sixty-six thousand, four hundred ninety-nine".