66631131763 has 32 divisors (see below), whose sum is σ = 83243040768. Its totient is φ = 52025587200.

The previous prime is 66631131739. The next prime is 66631131779. The reversal of 66631131763 is 36713113666.

66631131763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66631131763 - 2⁵ = 66631131731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66631131733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 801358 + ... + 880588.

It is an arithmetic number, because the mean of its divisors is an integer number (2601345024).

Almost surely, 2^66631131763 is an apocalyptic number.

66631131763 is a deficient number, since it is larger than the sum of its proper divisors (16611909005).

66631131763 is a wasteful number, since it uses less digits than its factorization.

66631131763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79483.

The product of its digits is 244944, while the sum is 43.

The spelling of 66631131763 in words is "sixty-six billion, six hundred thirty-one million, one hundred thirty-one thousand, seven hundred sixty-three".