664454063 has 24 divisors (see below), whose sum is σ = 834280272. Its totient is φ = 524530944.

The previous prime is 664454059. The next prime is 664454071. The reversal of 664454063 is 360454466.

It is a happy number.

It is not a de Polignac number, because 664454063 - 2² = 664454059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664454363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 373031 + ... + 374807.

It is an arithmetic number, because the mean of its divisors is an integer number (34761678).

Almost surely, 2^664454063 is an apocalyptic number.

664454063 is a deficient number, since it is larger than the sum of its proper divisors (169826209).

664454063 is a wasteful number, since it uses less digits than its factorization.

664454063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 664454063 is about 25777.0064786429. The cubic root of 664454063 is about 872.6129499124.

The spelling of 664454063 in words is "six hundred sixty-four million, four hundred fifty-four thousand, sixty-three".