664246022239 has 4 divisors (see below), whose sum is σ = 664916301760. Its totient is φ = 663575742720.

The previous prime is 664246022171. The next prime is 664246022249. The reversal of 664246022239 is 932220642466.

664246022239 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: 932220642466 = 2 ⋅466110321233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664246022239 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 (664246022249) 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, 335138274 + ... + 335140255.

It is an arithmetic number, because the mean of its divisors is an integer number (166229075440).

Almost surely, 2^664246022239 is an apocalyptic number.

664246022239 is a deficient number, since it is larger than the sum of its proper divisors (670279521).

664246022239 is an equidigital number, since it uses as much as digits as its factorization.

664246022239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670279520.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 664246022239 in words is "six hundred sixty-four billion, two hundred forty-six million, twenty-two thousand, two hundred thirty-nine".