664560877167 has 16 divisors (see below), whose sum is σ = 1074037781760. Its totient is φ = 402764167800.

The previous prime is 664560877139. The next prime is 664560877171. The reversal of 664560877167 is 761778065466.

It is a happy number.

664560877167 is a `hidden beast` number, since 6 + 6 + 4 + 5 + 608 + 7 + 7 + 16 + 7 = 666.

It is not a de Polignac number, because 664560877167 - 2¹⁶ = 664560811631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664560877067) 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, 1118789059 + ... + 1118789652.

It is an arithmetic number, because the mean of its divisors is an integer number (67127361360).

Almost surely, 2^664560877167 is an apocalyptic number.

664560877167 is a deficient number, since it is larger than the sum of its proper divisors (409476904593).

664560877167 is a wasteful number, since it uses less digits than its factorization.

664560877167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237578731 (or 2237578725 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 664560877167 in words is "six hundred sixty-four billion, five hundred sixty million, eight hundred seventy-seven thousand, one hundred sixty-seven".