27065981 has 8 divisors (see below), whose sum is σ = 28191744. Its totient is φ = 25961040.

The previous prime is 27065957. The next prime is 27065993. The reversal of 27065981 is 18956072.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27065981 - 2¹⁰ = 27064957 is a prime.

It is a super-2 number, since 2×27065981² = 1465134654984722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27065911) 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, 2525 + ... + 7778.

It is an arithmetic number, because the mean of its divisors is an integer number (3523968).

Almost surely, 2^27065981 is an apocalyptic number.

It is an amenable number.

27065981 is a deficient number, since it is larger than the sum of its proper divisors (1125763).

27065981 is a wasteful number, since it uses less digits than its factorization.

27065981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10411.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 27065981 is about 5202.4975732815. The cubic root of 27065981 is about 300.2441752816.

The spelling of 27065981 in words is "twenty-seven million, sixty-five thousand, nine hundred eighty-one".