66136763 has 8 divisors (see below), whose sum is σ = 82456320. Its totient is φ = 51535080.

The previous prime is 66136757. The next prime is 66136781. The reversal of 66136763 is 36763166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66136763 - 2⁴ = 66136747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66136163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429383 + ... + 429536.

It is an arithmetic number, because the mean of its divisors is an integer number (10307040).

Almost surely, 2^66136763 is an apocalyptic number.

66136763 is a deficient number, since it is larger than the sum of its proper divisors (16319557).

66136763 is a wasteful number, since it uses less digits than its factorization.

66136763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858937.

The product of its digits is 81648, while the sum is 38.

The square root of 66136763 is about 8132.4512294879. The cubic root of 66136763 is about 404.4029469062.

The spelling of 66136763 in words is "sixty-six million, one hundred thirty-six thousand, seven hundred sixty-three".