664422553 has 8 divisors (see below), whose sum is σ = 683456256. Its totient is φ = 645651600.

The previous prime is 664422547. The next prime is 664422557. The reversal of 664422553 is 355224466.

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

It is a cyclic number.

It is not a de Polignac number, because 664422553 - 2⁹ = 664422041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664422557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60553 + ... + 70678.

It is an arithmetic number, because the mean of its divisors is an integer number (85432032).

Almost surely, 2^664422553 is an apocalyptic number.

It is an amenable number.

664422553 is a deficient number, since it is larger than the sum of its proper divisors (19033703).

664422553 is a wasteful number, since it uses less digits than its factorization.

664422553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131375.

The product of its digits is 172800, while the sum is 37.

The square root of 664422553 is about 25776.3952677639. The cubic root of 664422553 is about 872.5991558970.

The spelling of 664422553 in words is "six hundred sixty-four million, four hundred twenty-two thousand, five hundred fifty-three".