664454845 has 8 divisors (see below), whose sum is σ = 797587200. Its totient is φ = 531402960.

The previous prime is 664454821. The next prime is 664454863. The reversal of 664454845 is 548454466.

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

It is not a de Polignac number, because 664454845 - 2¹¹ = 664452797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664454795 and 664454804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 36454.

It is an arithmetic number, because the mean of its divisors is an integer number (99698400).

Almost surely, 2^664454845 is an apocalyptic number.

It is an amenable number.

664454845 is a deficient number, since it is larger than the sum of its proper divisors (133132355).

664454845 is a wasteful number, since it uses less digits than its factorization.

664454845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40235.

The product of its digits is 1843200, while the sum is 46.

The square root of 664454845 is about 25777.0216471958. The cubic root of 664454845 is about 872.6132922401.

The spelling of 664454845 in words is "six hundred sixty-four million, four hundred fifty-four thousand, eight hundred forty-five".