664152554 has 32 divisors (see below), whose sum is σ = 1133080704. Its totient is φ = 289650240.

The previous prime is 664152551. The next prime is 664152569. The reversal of 664152554 is 455251466.

It is a super-2 number, since 2×664152554² = 882197229969445832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42944 + ... + 56324.

It is an arithmetic number, because the mean of its divisors is an integer number (35408772).

Almost surely, 2^664152554 is an apocalyptic number.

664152554 is a deficient number, since it is larger than the sum of its proper divisors (468928150).

664152554 is a wasteful number, since it uses less digits than its factorization.

664152554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13502.

The product of its digits is 144000, while the sum is 38.

The square root of 664152554 is about 25771.1574051303. The cubic root of 664152554 is about 872.4809415574.

It can be divided in two parts, 6641 and 52554, that added together give a palindrome (59195).

The spelling of 664152554 in words is "six hundred sixty-four million, one hundred fifty-two thousand, five hundred fifty-four".