27664751 has 2 divisors, whose sum is σ = 27664752. Its totient is φ = 27664750.

The previous prime is 27664727. The next prime is 27664757. The reversal of 27664751 is 15746672.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27664751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27664757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13832375 + 13832376.

It is an arithmetic number, because the mean of its divisors is an integer number (13832376).

Almost surely, 2^27664751 is an apocalyptic number.

27664751 is a deficient number, since it is larger than the sum of its proper divisors (1).

27664751 is an equidigital number, since it uses as much as digits as its factorization.

27664751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 38.

The square root of 27664751 is about 5259.7291755375. The cubic root of 27664751 is about 302.4421071735.

The spelling of 27664751 in words is "twenty-seven million, six hundred sixty-four thousand, seven hundred fifty-one".