26668665 has 48 divisors (see below), whose sum is σ = 49735296. Its totient is φ = 13171200.

The previous prime is 26668639. The next prime is 26668669. The reversal of 26668665 is 56686662.

It is not a de Polignac number, because 26668665 - 2¹² = 26664569 is a prime.

It is a super-2 number, since 2×26668665² = 1422435385764450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 26668665.

It is not an unprimeable number, because it can be changed into a prime (26668669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54070 + ... + 54560.

It is an arithmetic number, because the mean of its divisors is an integer number (1036152).

Almost surely, 2^26668665 is an apocalyptic number.

It is an amenable number.

26668665 is a deficient number, since it is larger than the sum of its proper divisors (23066631).

26668665 is a wasteful number, since it uses less digits than its factorization.

26668665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 587 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 26668665 is about 5164.1712791115. The cubic root of 26668665 is about 298.7677790345.

The spelling of 26668665 in words is "twenty-six million, six hundred sixty-eight thousand, six hundred sixty-five".