664322045 has 8 divisors (see below), whose sum is σ = 798503424. Its totient is φ = 530579664.

The previous prime is 664322027. The next prime is 664322047. The reversal of 664322045 is 540223466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664322045 - 2⁸ = 664321789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664322047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106409 + ... + 112478.

It is an arithmetic number, because the mean of its divisors is an integer number (99812928).

Almost surely, 2^664322045 is an apocalyptic number.

It is an amenable number.

664322045 is a deficient number, since it is larger than the sum of its proper divisors (134181379).

664322045 is a wasteful number, since it uses less digits than its factorization.

664322045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219499.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 664322045 is about 25774.4455808462. The cubic root of 664322045 is about 872.5551539697. Note that the first 3 decimals are identical.

The spelling of 664322045 in words is "six hundred sixty-four million, three hundred twenty-two thousand, forty-five".