664960761633862 has 8 divisors (see below), whose sum is σ = 1001722005723816. Its totient is φ = 331053426392592.

The previous prime is 664960761633811. The next prime is 664960761633887. The reversal of 664960761633862 is 268336167069466.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713477211588 + ... + 713477212519.

It is an arithmetic number, because the mean of its divisors is an integer number (125215250715477).

Almost surely, 2^{664960761633862} is an apocalyptic number.

664960761633862 is a deficient number, since it is larger than the sum of its proper divisors (336761244089954).

664960761633862 is a wasteful number, since it uses less digits than its factorization.

664960761633862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426954424342.

The product of its (nonzero) digits is 1693052928, while the sum is 73.

The spelling of 664960761633862 in words is "six hundred sixty-four trillion, nine hundred sixty billion, seven hundred sixty-one million, six hundred thirty-three thousand, eight hundred sixty-two".