66236026775725 has 12 divisors (see below), whose sum is σ = 82133157197056. Its totient is φ = 52988509165680.

The previous prime is 66236026775701. The next prime is 66236026775731. The reversal of 66236026775725 is 52757762063266.

It is a happy number.

It is not a de Polignac number, because 66236026775725 - 2⁵ = 66236026775693 is a prime.

It is a super-2 number, since 2×66236026775725² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3431007 + ... + 12010156.

Almost surely, 2^{66236026775725} is an apocalyptic number.

It is an amenable number.

66236026775725 is a deficient number, since it is larger than the sum of its proper divisors (15897130421331).

66236026775725 is a wasteful number, since it uses less digits than its factorization.

66236026775725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15612756 (or 15612751 counting only the distinct ones).

The product of its (nonzero) digits is 266716800, while the sum is 64.

The spelling of 66236026775725 in words is "sixty-six trillion, two hundred thirty-six billion, twenty-six million, seven hundred seventy-five thousand, seven hundred twenty-five".