664033451 has 4 divisors (see below), whose sum is σ = 698982600. Its totient is φ = 629084304.

The previous prime is 664033439. The next prime is 664033459. The reversal of 664033451 is 154330466.

664033451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154330466 = 2 ⋅77165233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664033451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664033459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17474546 + ... + 17474583.

It is an arithmetic number, because the mean of its divisors is an integer number (174745650).

Almost surely, 2^664033451 is an apocalyptic number.

664033451 is a deficient number, since it is larger than the sum of its proper divisors (34949149).

664033451 is a wasteful number, since it uses less digits than its factorization.

664033451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34949148.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 664033451 is about 25768.8465205566. The cubic root of 664033451 is about 872.4287842082.

The spelling of 664033451 in words is "six hundred sixty-four million, thirty-three thousand, four hundred fifty-one".