664153933 has 4 divisors (see below), whose sum is σ = 664499808. Its totient is φ = 663808060.

The previous prime is 664153913. The next prime is 664153937. The reversal of 664153933 is 339351466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664153933 - 2¹⁷ = 664022861 is a prime.

It is a super-2 number, since 2×664153933² = 882200893438736978, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664153937) 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 3 ways as a sum of consecutive naturals, for example, 170041 + ... + 173902.

It is an arithmetic number, because the mean of its divisors is an integer number (166124952).

Almost surely, 2^664153933 is an apocalyptic number.

It is an amenable number.

664153933 is a deficient number, since it is larger than the sum of its proper divisors (345875).

664153933 is a wasteful number, since it uses less digits than its factorization.

664153933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345874.

The product of its digits is 174960, while the sum is 40.

The square root of 664153933 is about 25771.1841598325. The cubic root of 664153933 is about 872.4815454098.

The spelling of 664153933 in words is "six hundred sixty-four million, one hundred fifty-three thousand, nine hundred thirty-three".