451664 has 10 divisors (see below), whose sum is σ = 875130. Its totient is φ = 225824.

The previous prime is 451663. The next prime is 451667. The reversal of 451664 is 466154.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 258064 + 193600 = 508^2 + 440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14099 + ... + 14130.

It is an arithmetic number, because the mean of its divisors is an integer number (87513).

2⁴⁵¹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

451664 is a deficient number, since it is larger than the sum of its proper divisors (423466).

451664 is a wasteful number, since it uses less digits than its factorization.

451664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28237 (or 28231 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 451664 is about 672.0595211735. The cubic root of 451664 is about 76.7252817867.

The spelling of 451664 in words is "four hundred fifty-one thousand, six hundred sixty-four".