66937800274 has 4 divisors (see below), whose sum is σ = 100406700414. Its totient is φ = 33468900136.

The previous prime is 66937800253. The next prime is 66937800277. The reversal of 66937800274 is 47200873966.

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., 49087504249 + 17850296025 = 221557^2 + 133605^2 .

It is not an unprimeable number, because it can be changed into a prime (66937800277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16734450067 + ... + 16734450070.

Almost surely, 2^66937800274 is an apocalyptic number.

66937800274 is a deficient number, since it is larger than the sum of its proper divisors (33468900140).

66937800274 is a wasteful number, since it uses less digits than its factorization.

66937800274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33468900139.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 66937800274 in words is "sixty-six billion, nine hundred thirty-seven million, eight hundred thousand, two hundred seventy-four".