66857798294 has 8 divisors (see below), whose sum is σ = 114613368528. Its totient is φ = 28653342120.

The previous prime is 66857798263. The next prime is 66857798311. The reversal of 66857798294 is 49289775866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 2387778497 + ... + 2387778524.

It is an arithmetic number, because the mean of its divisors is an integer number (14326671066).

Almost surely, 2^66857798294 is an apocalyptic number.

66857798294 is a deficient number, since it is larger than the sum of its proper divisors (47755570234).

66857798294 is a wasteful number, since it uses less digits than its factorization.

66857798294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775557030.

The product of its digits is 365783040, while the sum is 71.

The spelling of 66857798294 in words is "sixty-six billion, eight hundred fifty-seven million, seven hundred ninety-eight thousand, two hundred ninety-four".