66769021312 has 48 divisors (see below), whose sum is σ = 154733389020. Its totient is φ = 28615292160.

The previous prime is 66769021301. The next prime is 66769021337. The reversal of 66769021312 is 21312096766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5316514 + ... + 5329057.

Almost surely, 2^66769021312 is an apocalyptic number.

It is an amenable number.

66769021312 is an abundant number, since it is smaller than the sum of its proper divisors (87964367708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66769021312 is a wasteful number, since it uses less digits than its factorization.

66769021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10645599 (or 10645580 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 66769021312 in words is "sixty-six billion, seven hundred sixty-nine million, twenty-one thousand, three hundred twelve".