664190454 has 8 divisors (see below), whose sum is σ = 1328380920. Its totient is φ = 221396816.

The previous prime is 664190437. The next prime is 664190479. The reversal of 664190454 is 454091466.

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

664190454 is an admirable number.

It is a super-2 number, since 2×664190454² = 882297918369452232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55349199 + ... + 55349210.

It is an arithmetic number, because the mean of its divisors is an integer number (166047615).

Almost surely, 2^664190454 is an apocalyptic number.

664190454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664190454 is a wasteful number, since it uses less digits than its factorization.

664190454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110698414.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 664190454 is about 25771.8927127986. The cubic root of 664190454 is about 872.4975373422.

The spelling of 664190454 in words is "six hundred sixty-four million, one hundred ninety thousand, four hundred fifty-four".