27664725 has 24 divisors (see below), whose sum is σ = 49898592. Its totient is φ = 13412800.

The previous prime is 27664697. The next prime is 27664727. The reversal of 27664725 is 52746672.

It is a happy number.

It is not a de Polignac number, because 27664725 - 2⁹ = 27664213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15942 + ... + 17591.

It is an arithmetic number, because the mean of its divisors is an integer number (2079108).

Almost surely, 2^27664725 is an apocalyptic number.

27664725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27664725 is a deficient number, since it is larger than the sum of its proper divisors (22233867).

27664725 is a wasteful number, since it uses less digits than its factorization.

27664725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33557 (or 33552 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 27664725 is about 5259.7267039267. The cubic root of 27664725 is about 302.4420124260.

It can be divided in two parts, 276647 and 25, that added together give a palindrome (276672).

The spelling of 27664725 in words is "twenty-seven million, six hundred sixty-four thousand, seven hundred twenty-five".