66762339657 has 16 divisors (see below), whose sum is σ = 95917617600. Its totient is φ = 41061483072.

The previous prime is 66762339649. The next prime is 66762339659. The reversal of 66762339657 is 75693326766.

It is not a de Polignac number, because 66762339657 - 2³ = 66762339649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66762339657.

It is not an unprimeable number, because it can be changed into a prime (66762339659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409282 + ... + 548667.

It is an arithmetic number, because the mean of its divisors is an integer number (5994851100).

Almost surely, 2^66762339657 is an apocalyptic number.

It is an amenable number.

66762339657 is a deficient number, since it is larger than the sum of its proper divisors (29155277943).

66762339657 is a wasteful number, since it uses less digits than its factorization.

66762339657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959752.

The product of its digits is 51438240, while the sum is 60.

The spelling of 66762339657 in words is "sixty-six billion, seven hundred sixty-two million, three hundred thirty-nine thousand, six hundred fifty-seven".