66386776409632 has 24 divisors (see below), whose sum is σ = 149370246922176. Its totient is φ = 28451475604032.

The previous prime is 66386776409627. The next prime is 66386776409677. The reversal of 66386776409632 is 23690467768366.

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, 148184768548 + ... + 148184768995.

It is an arithmetic number, because the mean of its divisors is an integer number (6223760288424).

Almost surely, 2^{66386776409632} is an apocalyptic number.

It is an amenable number.

66386776409632 is an abundant number, since it is smaller than the sum of its proper divisors (82983470512544).

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

66386776409632 is a wasteful number, since it uses less digits than its factorization.

66386776409632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296369537560 (or 296369537552 counting only the distinct ones).

The product of its (nonzero) digits is 1975228416, while the sum is 73.

The spelling of 66386776409632 in words is "sixty-six trillion, three hundred eighty-six billion, seven hundred seventy-six million, four hundred nine thousand, six hundred thirty-two".