66693385675 has 24 divisors (see below), whose sum is σ = 94526762400. Its totient is φ = 45726458880.

The previous prime is 66693385643. The next prime is 66693385687. The reversal of 66693385675 is 57658339666.

It is not a de Polignac number, because 66693385675 - 2⁵ = 66693385643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1558971 + ... + 1601179.

It is an arithmetic number, because the mean of its divisors is an integer number (3938615100).

Almost surely, 2^66693385675 is an apocalyptic number.

66693385675 is a deficient number, since it is larger than the sum of its proper divisors (27833376725).

66693385675 is a wasteful number, since it uses less digits than its factorization.

66693385675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51255 (or 51250 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 64.

The spelling of 66693385675 in words is "sixty-six billion, six hundred ninety-three million, three hundred eighty-five thousand, six hundred seventy-five".