66857798295 has 12 divisors (see below), whose sum is σ = 115886850456. Its totient is φ = 35657492400.

The previous prime is 66857798263. The next prime is 66857798311. The reversal of 66857798295 is 59289775866.

It is not a de Polignac number, because 66857798295 - 2⁵ = 66857798263 is a prime.

It is a congruent number.

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, 742864381 + ... + 742864470.

It is an arithmetic number, because the mean of its divisors is an integer number (9657237538).

Almost surely, 2^66857798295 is an apocalyptic number.

66857798295 is a deficient number, since it is larger than the sum of its proper divisors (49029052161).

66857798295 is a wasteful number, since it uses less digits than its factorization.

66857798295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485728862 (or 1485728859 counting only the distinct ones).

The product of its digits is 457228800, while the sum is 72.

The spelling of 66857798295 in words is "sixty-six billion, eight hundred fifty-seven million, seven hundred ninety-eight thousand, two hundred ninety-five".