26669997 has 6 divisors (see below), whose sum is σ = 38523342. Its totient is φ = 17779992.

The previous prime is 26669989. The next prime is 26670001. The reversal of 26669997 is 79996662.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24740676 + 1929321 = 4974^2 + 1389^2 .

It is not a de Polignac number, because 26669997 - 2³ = 26669989 is a prime.

It is a super-2 number, since 2×26669997² = 1422577479960018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26669917) 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, 1481658 + ... + 1481675.

It is an arithmetic number, because the mean of its divisors is an integer number (6420557).

Almost surely, 2^26669997 is an apocalyptic number.

It is an amenable number.

26669997 is a deficient number, since it is larger than the sum of its proper divisors (11853345).

26669997 is a wasteful number, since it uses less digits than its factorization.

26669997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963339 (or 2963336 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 26669997 is about 5164.3002430145. The cubic root of 26669997 is about 298.7727530624.

The spelling of 26669997 in words is "twenty-six million, six hundred sixty-nine thousand, nine hundred ninety-seven".