66706773772 has 12 divisors (see below), whose sum is σ = 120502559296. Its totient is φ = 32277471120.

The previous prime is 66706773761. The next prime is 66706773829. The reversal of 66706773772 is 27737760766.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

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, 268978803 + ... + 268979050.

Almost surely, 2^66706773772 is an apocalyptic number.

66706773772 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66706773772 is a deficient number, since it is larger than the sum of its proper divisors (53795785524).

66706773772 is a wasteful number, since it uses less digits than its factorization.

66706773772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537957888 (or 537957886 counting only the distinct ones).

The product of its (nonzero) digits is 21781872, while the sum is 58.

The spelling of 66706773772 in words is "sixty-six billion, seven hundred six million, seven hundred seventy-three thousand, seven hundred seventy-two".