66624322994 has 16 divisors (see below), whose sum is σ = 101831434200. Its totient is φ = 32680627200.

The previous prime is 66624322981. The next prime is 66624323069. The reversal of 66624322994 is 49922342666.

It can be written as a sum of positive squares in 4 ways, for example, as 66622320769 + 2002225 = 258113^2 + 1415^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

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, 1520594 + ... + 1563794.

Almost surely, 2^66624322994 is an apocalyptic number.

66624322994 is a deficient number, since it is larger than the sum of its proper divisors (35207111206).

66624322994 is a wasteful number, since it uses less digits than its factorization.

66624322994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57805.

The product of its digits is 6718464, while the sum is 53.

The spelling of 66624322994 in words is "sixty-six billion, six hundred twenty-four million, three hundred twenty-two thousand, nine hundred ninety-four".