66790011784 has 32 divisors (see below), whose sum is σ = 128209878720. Its totient is φ = 32601514176.

The previous prime is 66790011767. The next prime is 66790012007. The reversal of 66790011784 is 48711009766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629509 + ... + 727915.

It is an arithmetic number, because the mean of its divisors is an integer number (4006558710).

Almost surely, 2^66790011784 is an apocalyptic number.

It is an amenable number.

66790011784 is a deficient number, since it is larger than the sum of its proper divisors (61419866936).

66790011784 is a wasteful number, since it uses less digits than its factorization.

66790011784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100429 (or 100425 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 66790011784 in words is "sixty-six billion, seven hundred ninety million, eleven thousand, seven hundred eighty-four".