664025254 has 8 divisors (see below), whose sum is σ = 998308080. Its totient is φ = 331255896.

The previous prime is 664025251. The next prime is 664025291. The reversal of 664025254 is 452520466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664025251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377269 + ... + 379024.

It is an arithmetic number, because the mean of its divisors is an integer number (124788510).

Almost surely, 2^664025254 is an apocalyptic number.

664025254 is a deficient number, since it is larger than the sum of its proper divisors (334282826).

664025254 is a wasteful number, since it uses less digits than its factorization.

664025254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756734.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 664025254 is about 25768.6874714255. The cubic root of 664025254 is about 872.4251943649.

The spelling of 664025254 in words is "six hundred sixty-four million, twenty-five thousand, two hundred fifty-four".