66765157339 has 4 divisors (see below), whose sum is σ = 66765758824. Its totient is φ = 66764555856.

The previous prime is 66765157337. The next prime is 66765157357. The reversal of 66765157339 is 93375156766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66765157339 - 2¹ = 66765157337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66765157337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80457 + ... + 374170.

It is an arithmetic number, because the mean of its divisors is an integer number (16691439706).

Almost surely, 2^66765157339 is an apocalyptic number.

66765157339 is a deficient number, since it is larger than the sum of its proper divisors (601485).

66765157339 is a wasteful number, since it uses less digits than its factorization.

66765157339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601484.

The product of its digits is 21432600, while the sum is 58.

The spelling of 66765157339 in words is "sixty-six billion, seven hundred sixty-five million, one hundred fifty-seven thousand, three hundred thirty-nine".