27660001 has 2 divisors, whose sum is σ = 27660002. Its totient is φ = 27660000.

The previous prime is 27659993. The next prime is 27660019. The reversal of 27660001 is 10006672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23270976 + 4389025 = 4824^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 27660001 - 2³ = 27659993 is a prime.

It is not a weakly prime, because it can be changed into another prime (27660701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13830000 + 13830001.

It is an arithmetic number, because the mean of its divisors is an integer number (13830001).

Almost surely, 2^27660001 is an apocalyptic number.

It is an amenable number.

27660001 is a deficient number, since it is larger than the sum of its proper divisors (1).

27660001 is an equidigital number, since it uses as much as digits as its factorization.

27660001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 27660001 is about 5259.2776119920. The cubic root of 27660001 is about 302.4247965503.

Adding to 27660001 its reverse (10006672), we get a palindrome (37666673).

The spelling of 27660001 in words is "twenty-seven million, six hundred sixty thousand, one".