66673393677 has 80 divisors (see below), whose sum is σ = 117032593920. Its totient is φ = 37390701600.

The previous prime is 66673393651. The next prime is 66673393751. The reversal of 66673393677 is 77639337666.

It is not a de Polignac number, because 66673393677 - 2¹⁸ = 66673131533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66673393637) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 682152 + ... + 773742.

It is an arithmetic number, because the mean of its divisors is an integer number (1462907424).

Almost surely, 2^66673393677 is an apocalyptic number.

It is an amenable number.

66673393677 is a deficient number, since it is larger than the sum of its proper divisors (50359200243).

66673393677 is a wasteful number, since it uses less digits than its factorization.

66673393677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91676 (or 91667 counting only the distinct ones).

The product of its digits is 108020304, while the sum is 63.

The spelling of 66673393677 in words is "sixty-six billion, six hundred seventy-three million, three hundred ninety-three thousand, six hundred seventy-seven".