664152555 has 16 divisors (see below), whose sum is σ = 1159248384. Its totient is φ = 322013280.

The previous prime is 664152551. The next prime is 664152569. The reversal of 664152555 is 555251466.

It is a happy number.

It is not a de Polignac number, because 664152555 - 2² = 664152551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664152551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2012419 + ... + 2012748.

It is an arithmetic number, because the mean of its divisors is an integer number (72453024).

Almost surely, 2^664152555 is an apocalyptic number.

664152555 is a deficient number, since it is larger than the sum of its proper divisors (495095829).

664152555 is a wasteful number, since it uses less digits than its factorization.

664152555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025186.

The product of its digits is 180000, while the sum is 39.

The square root of 664152555 is about 25771.1574245318. The cubic root of 664152555 is about 872.4809419952.

The spelling of 664152555 in words is "six hundred sixty-four million, one hundred fifty-two thousand, five hundred fifty-five".