66740366674 has 32 divisors (see below), whose sum is σ = 109700697600. Its totient is φ = 30315774720.

The previous prime is 66740366629. The next prime is 66740366699. The reversal of 66740366674 is 47666304766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328617 + ... + 491395.

It is an arithmetic number, because the mean of its divisors is an integer number (3428146800).

Almost surely, 2^66740366674 is an apocalyptic number.

66740366674 is a deficient number, since it is larger than the sum of its proper divisors (42960330926).

66740366674 is a wasteful number, since it uses less digits than its factorization.

66740366674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163218.

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 66740366674 in words is "sixty-six billion, seven hundred forty million, three hundred sixty-six thousand, six hundred seventy-four".