66677457055250 has 16 divisors (see below), whose sum is σ = 124820199607896. Its totient is φ = 26670982822000.

The previous prime is 66677457055249. The next prime is 66677457055277. The reversal of 66677457055250 is 5255075477666.

It can be written as a sum of positive squares in 4 ways, for example, as 34526776650601 + 32150680404649 = 5875949^2 + 5670157^2 .

It is a Curzon number.

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, 133354913861 + ... + 133354914360.

Almost surely, 2^{66677457055250} is an apocalyptic number.

66677457055250 is a deficient number, since it is larger than the sum of its proper divisors (58142742552646).

66677457055250 is a wasteful number, since it uses less digits than its factorization.

66677457055250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266709828238 (or 266709828228 counting only the distinct ones).

The product of its (nonzero) digits is 370440000, while the sum is 65.

The spelling of 66677457055250 in words is "sixty-six trillion, six hundred seventy-seven billion, four hundred fifty-seven million, fifty-five thousand, two hundred fifty".