66869129288 has 16 divisors (see below), whose sum is σ = 135024203580. Its totient is φ = 30862675008.

The previous prime is 66869129273. The next prime is 66869129309. The reversal of 66869129288 is 88292196866.

66869129288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 66800537764 + 68591524 = 258458^2 + 8282^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321486095 + ... + 321486302.

Almost surely, 2^66869129288 is an apocalyptic number.

It is an amenable number.

66869129288 is an abundant number, since it is smaller than the sum of its proper divisors (68155074292).

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

66869129288 is a wasteful number, since it uses less digits than its factorization.

66869129288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642972416 (or 642972412 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 65.

The spelling of 66869129288 in words is "sixty-six billion, eight hundred sixty-nine million, one hundred twenty-nine thousand, two hundred eighty-eight".