27745663 has 12 divisors (see below), whose sum is σ = 31552920. Its totient is φ = 24350480.

The previous prime is 27745639. The next prime is 27745687. The reversal of 27745663 is 36654772.

It is an interprime number because it is at equal distance from previous prime (27745639) and next prime (27745687).

It is not a de Polignac number, because 27745663 - 2⁵ = 27745631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27745633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445 + ... + 7462.

It is an arithmetic number, because the mean of its divisors is an integer number (2629410).

Almost surely, 2^27745663 is an apocalyptic number.

27745663 is a deficient number, since it is larger than the sum of its proper divisors (3807257).

27745663 is a wasteful number, since it uses less digits than its factorization.

27745663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958 (or 7947 counting only the distinct ones).

The product of its digits is 211680, while the sum is 40.

The square root of 27745663 is about 5267.4152105183. The cubic root of 27745663 is about 302.7366742832.

The spelling of 27745663 in words is "twenty-seven million, seven hundred forty-five thousand, six hundred sixty-three".