664765632646154 has 16 divisors (see below), whose sum is σ = 1073852960560800. Its totient is φ = 306814683161520.

The previous prime is 664765632646111. The next prime is 664765632646229. The reversal of 664765632646154 is 451646236567466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30055289 + ... + 47253059.

It is an arithmetic number, because the mean of its divisors is an integer number (67115810035050).

Almost surely, 2^{664765632646154} is an apocalyptic number.

664765632646154 is a deficient number, since it is larger than the sum of its proper divisors (409087327914646).

664765632646154 is a wasteful number, since it uses less digits than its factorization.

664765632646154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18684485.

The product of its digits is 3135283200, while the sum is 71.

The spelling of 664765632646154 in words is "six hundred sixty-four trillion, seven hundred sixty-five billion, six hundred thirty-two million, six hundred forty-six thousand, one hundred fifty-four".