66192396794 has 4 divisors (see below), whose sum is σ = 99288595194. Its totient is φ = 33096198396.

The previous prime is 66192396793. The next prime is 66192396833. The reversal of 66192396794 is 49769329166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64625266225 + 1567130569 = 254215^2 + 39587^2 .

It is not an unprimeable number, because it can be changed into a prime (66192396793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16548099197 + ... + 16548099200.

Almost surely, 2^66192396794 is an apocalyptic number.

66192396794 is a deficient number, since it is larger than the sum of its proper divisors (33096198400).

66192396794 is a wasteful number, since it uses less digits than its factorization.

66192396794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33096198399.

The product of its digits is 26453952, while the sum is 62.

The spelling of 66192396794 in words is "sixty-six billion, one hundred ninety-two million, three hundred ninety-six thousand, seven hundred ninety-four".