66820266674 has 32 divisors (see below), whose sum is σ = 121301712000. Its totient is φ = 26949489408.

The previous prime is 66820266649. The next prime is 66820266703. The reversal of 66820266674 is 47666202866.

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, 3739349 + ... + 3757175.

It is an arithmetic number, because the mean of its divisors is an integer number (3790678500).

Almost surely, 2^66820266674 is an apocalyptic number.

66820266674 is a deficient number, since it is larger than the sum of its proper divisors (54481445326).

66820266674 is a wasteful number, since it uses less digits than its factorization.

66820266674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33602.

The product of its (nonzero) digits is 6967296, while the sum is 53.

The spelling of 66820266674 in words is "sixty-six billion, eight hundred twenty million, two hundred sixty-six thousand, six hundred seventy-four".