664025033 has 4 divisors (see below), whose sum is σ = 758885760. Its totient is φ = 569164308.

The previous prime is 664025029. The next prime is 664025161. The reversal of 664025033 is 330520466.

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 664025033 - 2² = 664025029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664024987 and 664025005.

It is not an unprimeable number, because it can be changed into a prime (664025533) 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, 47430353 + ... + 47430366.

It is an arithmetic number, because the mean of its divisors is an integer number (189721440).

Almost surely, 2^664025033 is an apocalyptic number.

It is an amenable number.

664025033 is a deficient number, since it is larger than the sum of its proper divisors (94860727).

664025033 is an equidigital number, since it uses as much as digits as its factorization.

664025033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94860726.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 664025033 is about 25768.6831832750. The cubic root of 664025033 is about 872.4250975784.

Adding to 664025033 its reverse (330520466), we get a palindrome (994545499).

The spelling of 664025033 in words is "six hundred sixty-four million, twenty-five thousand, thirty-three".