26506566 has 12 divisors (see below), whose sum is σ = 57430932. Its totient is φ = 8835516.

The previous prime is 26506561. The next prime is 26506567. The reversal of 26506566 is 66560562.

It is a super-2 number, since 2×26506566² = 1405196082224712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26506566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26506561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 736276 + ... + 736311.

It is an arithmetic number, because the mean of its divisors is an integer number (4785911).

Almost surely, 2^26506566 is an apocalyptic number.

26506566 is an abundant number, since it is smaller than the sum of its proper divisors (30924366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26506566 is a wasteful number, since it uses less digits than its factorization.

26506566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472595 (or 1472592 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 26506566 is about 5148.4527772914. The cubic root of 26506566 is about 298.1612193117.

It can be divided in two parts, 26506 and 566, that added together give a palindrome (27072).

The spelling of 26506566 in words is "twenty-six million, five hundred six thousand, five hundred sixty-six".