66935782474 has 16 divisors (see below), whose sum is σ = 112491586656. Its totient is φ = 29603048400.

The previous prime is 66935782457. The next prime is 66935782489. The reversal of 66935782474 is 47428753966.

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, 41114532 + ... + 41116159.

It is an arithmetic number, because the mean of its divisors is an integer number (7030724166).

Almost surely, 2^66935782474 is an apocalyptic number.

66935782474 is a deficient number, since it is larger than the sum of its proper divisors (45555804182).

66935782474 is a wasteful number, since it uses less digits than its factorization.

66935782474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82230741.

The product of its digits is 60963840, while the sum is 61.

The spelling of 66935782474 in words is "sixty-six billion, nine hundred thirty-five million, seven hundred eighty-two thousand, four hundred seventy-four".