664654455 has 24 divisors (see below), whose sum is σ = 1165954608. Its totient is φ = 350209536.

The previous prime is 664654439. The next prime is 664654469. The reversal of 664654455 is 554456466.

664654455 is a `hidden beast` number, since 66 + 46 + 544 + 5 + 5 = 666.

It is not a de Polignac number, because 664654455 - 2⁴ = 664654439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664654455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85242 + ... + 92711.

It is an arithmetic number, because the mean of its divisors is an integer number (48581442).

Almost surely, 2^664654455 is an apocalyptic number.

664654455 is a deficient number, since it is larger than the sum of its proper divisors (501300153).

664654455 is a wasteful number, since it uses less digits than its factorization.

664654455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178047 (or 178044 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The square root of 664654455 is about 25780.8932157131. The cubic root of 664654455 is about 872.7006645681.

The spelling of 664654455 in words is "six hundred sixty-four million, six hundred fifty-four thousand, four hundred fifty-five".