66129693495 has 16 divisors (see below), whose sum is σ = 110407836672. Its totient is φ = 33735727520.

The previous prime is 66129693479. The next prime is 66129693527. The reversal of 66129693495 is 59439692166.

It is not a de Polignac number, because 66129693495 - 2⁴ = 66129693479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95839791 + ... + 95840480.

It is an arithmetic number, because the mean of its divisors is an integer number (6900489792).

Almost surely, 2^66129693495 is an apocalyptic number.

66129693495 is a deficient number, since it is larger than the sum of its proper divisors (44278143177).

66129693495 is a wasteful number, since it uses less digits than its factorization.

66129693495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191680302.

The product of its digits is 18895680, while the sum is 60.

The spelling of 66129693495 in words is "sixty-six billion, one hundred twenty-nine million, six hundred ninety-three thousand, four hundred ninety-five".