667863437697 has 48 divisors (see below), whose sum is σ = 1016976617280. Its totient is φ = 421884809856.

The previous prime is 667863437669. The next prime is 667863437713. The reversal of 667863437697 is 796734368766.

667863437697 is a `hidden beast` number, since 6 + 6 + 78 + 63 + 437 + 69 + 7 = 666.

It is not a de Polignac number, because 667863437697 - 2⁷ = 667863437569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667863437627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1943383 + ... + 2261075.

It is an arithmetic number, because the mean of its divisors is an integer number (21187012860).

Almost surely, 2^667863437697 is an apocalyptic number.

It is an amenable number.

667863437697 is a deficient number, since it is larger than the sum of its proper divisors (349113179583).

667863437697 is a wasteful number, since it uses less digits than its factorization.

667863437697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317902 (or 317899 counting only the distinct ones).

The product of its digits is 1152216576, while the sum is 72.

The spelling of 667863437697 in words is "six hundred sixty-seven billion, eight hundred sixty-three million, four hundred thirty-seven thousand, six hundred ninety-seven".