66777143212 has 12 divisors (see below), whose sum is σ = 125849231536. Its totient is φ = 30820219920.

The previous prime is 66777143201. The next prime is 66777143239. The reversal of 66777143212 is 21234177766.

It is a hoax number, since the sum of its digits (46) 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, 642087864 + ... + 642087967.

Almost surely, 2^66777143212 is an apocalyptic number.

It is an amenable number.

66777143212 is a deficient number, since it is larger than the sum of its proper divisors (59072088324).

66777143212 is a wasteful number, since it uses less digits than its factorization.

66777143212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284175848 (or 1284175846 counting only the distinct ones).

The product of its digits is 592704, while the sum is 46.

The spelling of 66777143212 in words is "sixty-six billion, seven hundred seventy-seven million, one hundred forty-three thousand, two hundred twelve".