26666990 has 16 divisors (see below), whose sum is σ = 54857952. Its totient is φ = 9142944.

The previous prime is 26666957. The next prime is 26667007. The reversal of 26666990 is 9966662.

It is a happy number.

It is a super-2 number, since 2×26666990² = 1422256711320200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190409 + ... + 190548.

It is an arithmetic number, because the mean of its divisors is an integer number (3428622).

Almost surely, 2^26666990 is an apocalyptic number.

26666990 is an abundant number, since it is smaller than the sum of its proper divisors (28190962).

26666990 is a wasteful number, since it uses less digits than its factorization.

26666990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380971.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 26666990 is about 5164.0091014637. The cubic root of 26666990 is about 298.7615239219.

The spelling of 26666990 in words is "twenty-six million, six hundred sixty-six thousand, nine hundred ninety".