10665256601 has 4 divisors (see below), whose sum is σ = 11033024100. Its totient is φ = 10297489104.

The previous prime is 10665256579. The next prime is 10665256631.

10665256601 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8888718400 + 1776538201 = 94280^2 + 42149^2 .

It is a cyclic number.

It is not a de Polignac number, because 10665256601 - 2²⁶ = 10598147737 is a prime.

It is a super-2 number, since 2×10665256601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10665256631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183883706 + ... + 183883763.

It is an arithmetic number, because the mean of its divisors is an integer number (2758256025).

Almost surely, 2^10665256601 is an apocalyptic number.

It is an amenable number.

10665256601 is a deficient number, since it is larger than the sum of its proper divisors (367767499).

10665256601 is an equidigital number, since it uses as much as digits as its factorization.

10665256601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367767498.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 10665256601 in words is "ten billion, six hundred sixty-five million, two hundred fifty-six thousand, six hundred one".