664012127 has 2 divisors, whose sum is σ = 664012128. Its totient is φ = 664012126.

The previous prime is 664012123. The next prime is 664012199. The reversal of 664012127 is 721210466.

664012127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664012127 - 2² = 664012123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664012127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664012121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332006063 + 332006064.

It is an arithmetic number, because the mean of its divisors is an integer number (332006064).

Almost surely, 2^664012127 is an apocalyptic number.

664012127 is a deficient number, since it is larger than the sum of its proper divisors (1).

664012127 is an equidigital number, since it uses as much as digits as its factorization.

664012127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 664012127 is about 25768.4327618115. The cubic root of 664012127 is about 872.4194453862.

The spelling of 664012127 in words is "six hundred sixty-four million, twelve thousand, one hundred twenty-seven".