66717852834 has 16 divisors (see below), whose sum is σ = 133707474720. Its totient is φ = 22193989440.

The previous prime is 66717852827. The next prime is 66717852847. The reversal of 66717852834 is 43825871766.

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, 11320519 + ... + 11326410.

It is an arithmetic number, because the mean of its divisors is an integer number (8356717170).

Almost surely, 2^66717852834 is an apocalyptic number.

66717852834 is an abundant number, since it is smaller than the sum of its proper divisors (66989621886).

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

66717852834 is a wasteful number, since it uses less digits than its factorization.

66717852834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22647425.

The product of its digits is 13547520, while the sum is 57.

The spelling of 66717852834 in words is "sixty-six billion, seven hundred seventeen million, eight hundred fifty-two thousand, eight hundred thirty-four".