664263215814 has 32 divisors (see below), whose sum is σ = 1449371719296. Its totient is φ = 201282139520.

The previous prime is 664263215813. The next prime is 664263215831. The reversal of 664263215814 is 418512362466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664263215813) 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, 1193929 + ... + 1659515.

It is an arithmetic number, because the mean of its divisors is an integer number (45292866228).

Almost surely, 2^664263215814 is an apocalyptic number.

664263215814 is an abundant number, since it is smaller than the sum of its proper divisors (785108503482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664263215814 is a wasteful number, since it uses less digits than its factorization.

664263215814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487220.

The product of its digits is 1658880, while the sum is 48.

The spelling of 664263215814 in words is "six hundred sixty-four billion, two hundred sixty-three million, two hundred fifteen thousand, eight hundred fourteen".