66295423999 has 16 divisors (see below), whose sum is σ = 75906183168. Its totient is φ = 56719763712.

The previous prime is 66295423981. The next prime is 66295424023. The reversal of 66295423999 is 99932459266.

It is a cyclic number.

It is not a de Polignac number, because 66295423999 - 2⁵ = 66295423967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66295423999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66295423949) 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, 11316079 + ... + 11321935.

It is an arithmetic number, because the mean of its divisors is an integer number (4744136448).

Almost surely, 2^66295423999 is an apocalyptic number.

66295423999 is a deficient number, since it is larger than the sum of its proper divisors (9610759169).

66295423999 is a wasteful number, since it uses less digits than its factorization.

66295423999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574.

The product of its digits is 56687040, while the sum is 64.

The spelling of 66295423999 in words is "sixty-six billion, two hundred ninety-five million, four hundred twenty-three thousand, nine hundred ninety-nine".