664456127 has 8 divisors (see below), whose sum is σ = 690252192. Its totient is φ = 639116800.

The previous prime is 664456109. The next prime is 664456157. The reversal of 664456127 is 721654466.

It is a happy number.

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 664456127 - 2⁶ = 664456063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664456157) 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, 111218 + ... + 117039.

It is an arithmetic number, because the mean of its divisors is an integer number (86281524).

Almost surely, 2^664456127 is an apocalyptic number.

664456127 is a deficient number, since it is larger than the sum of its proper divisors (25796065).

664456127 is a wasteful number, since it uses less digits than its factorization.

664456127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228369.

The product of its digits is 241920, while the sum is 41.

The square root of 664456127 is about 25777.0465142925. The cubic root of 664456127 is about 872.6138534468.

The spelling of 664456127 in words is "six hundred sixty-four million, four hundred fifty-six thousand, one hundred twenty-seven".