66807318276 has 36 divisors (see below), whose sum is σ = 176216406912. Its totient is φ = 21300883824.

The previous prime is 66807318269. The next prime is 66807318287. The reversal of 66807318276 is 67281370866.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×66807318276² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40341756 + ... + 40343411.

It is an arithmetic number, because the mean of its divisors is an integer number (4894900192).

Almost surely, 2^66807318276 is an apocalyptic number.

It is an amenable number.

66807318276 is an abundant number, since it is smaller than the sum of its proper divisors (109409088636).

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

66807318276 is a wasteful number, since it uses less digits than its factorization.

66807318276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80685200 (or 80685195 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 66807318276 in words is "sixty-six billion, eight hundred seven million, three hundred eighteen thousand, two hundred seventy-six".