66617232074 has 4 divisors (see below), whose sum is σ = 99925848114. Its totient is φ = 33308616036.

The previous prime is 66617232037. The next prime is 66617232089. The reversal of 66617232074 is 47023271666.

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., 63180341449 + 3436890625 = 251357^2 + 58625^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16654308017 + ... + 16654308020.

Almost surely, 2^66617232074 is an apocalyptic number.

66617232074 is a deficient number, since it is larger than the sum of its proper divisors (33308616040).

66617232074 is a wasteful number, since it uses less digits than its factorization.

66617232074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33308616039.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 66617232074 in words is "sixty-six billion, six hundred seventeen million, two hundred thirty-two thousand, seventy-four".