664351233 has 16 divisors (see below), whose sum is σ = 1090217856. Its totient is φ = 350426880.

The previous prime is 664351231. The next prime is 664351267. The reversal of 664351233 is 332153466.

It is not a de Polignac number, because 664351233 - 2¹ = 664351231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664351194 and 664351203.

It is not an unprimeable number, because it can be changed into a prime (664351231) 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, 1216488 + ... + 1217033.

It is an arithmetic number, because the mean of its divisors is an integer number (68138616).

Almost surely, 2^664351233 is an apocalyptic number.

It is an amenable number.

664351233 is a deficient number, since it is larger than the sum of its proper divisors (425866623).

664351233 is a wasteful number, since it uses less digits than its factorization.

664351233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433544.

The product of its digits is 38880, while the sum is 33.

The square root of 664351233 is about 25775.0117943717. The cubic root of 664351233 is about 872.5679327954.

The spelling of 664351233 in words is "six hundred sixty-four million, three hundred fifty-one thousand, two hundred thirty-three".