66663012757 has 16 divisors (see below), whose sum is σ = 76581394560. Its totient is φ = 57435998400.

The previous prime is 66663012743. The next prime is 66663012811. The reversal of 66663012757 is 75721036666.

It is not a de Polignac number, because 66663012757 - 2²³ = 66654624149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66663012757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66663012737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181094 + ... + 1236247.

It is an arithmetic number, because the mean of its divisors is an integer number (4786337160).

Almost surely, 2^66663012757 is an apocalyptic number.

It is an amenable number.

66663012757 is a deficient number, since it is larger than the sum of its proper divisors (9918381803).

66663012757 is a wasteful number, since it uses less digits than its factorization.

66663012757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417484.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 66663012757 in words is "sixty-six billion, six hundred sixty-three million, twelve thousand, seven hundred fifty-seven".