26666864 has 40 divisors (see below), whose sum is σ = 59290848. Its totient is φ = 11381760.

The previous prime is 26666833. The next prime is 26666869. The reversal of 26666864 is 46866662.

It is a super-2 number, since 2×26666864² = 1422243271188992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26666869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50924 + ... + 51444.

Almost surely, 2^26666864 is an apocalyptic number.

It is an amenable number.

26666864 is an abundant number, since it is smaller than the sum of its proper divisors (32623984).

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

26666864 is a wasteful number, since it uses less digits than its factorization.

26666864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 987 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 26666864 is about 5163.9969016257. The cubic root of 26666864 is about 298.7610533774.

The spelling of 26666864 in words is "twenty-six million, six hundred sixty-six thousand, eight hundred sixty-four".