664105054 has 4 divisors (see below), whose sum is σ = 996157584. Its totient is φ = 332052526.

The previous prime is 664105037. The next prime is 664105061. The reversal of 664105054 is 450501466.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166026262 + ... + 166026265.

It is an arithmetic number, because the mean of its divisors is an integer number (249039396).

Almost surely, 2^664105054 is an apocalyptic number.

664105054 is a deficient number, since it is larger than the sum of its proper divisors (332052530).

664105054 is a wasteful number, since it uses less digits than its factorization.

664105054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332052529.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 664105054 is about 25770.2358157623. The cubic root of 664105054 is about 872.4601411993.

The spelling of 664105054 in words is "six hundred sixty-four million, one hundred five thousand, fifty-four".