664841551167 has 12 divisors (see below), whose sum is σ = 960451228360. Its totient is φ = 443170219248.

The previous prime is 664841551133. The next prime is 664841551217. The reversal of 664841551167 is 761155148466.

664841551167 is a `hidden beast` number, since 6 + 6 + 4 + 84 + 1 + 551 + 1 + 6 + 7 = 666.

It is not a de Polignac number, because 664841551167 - 2¹⁵ = 664841518399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664841551667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4716817 + ... + 4855722.

Almost surely, 2^664841551167 is an apocalyptic number.

664841551167 is a deficient number, since it is larger than the sum of its proper divisors (295609677193).

664841551167 is a wasteful number, since it uses less digits than its factorization.

664841551167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9580262 (or 9580259 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 664841551167 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred fifty-one thousand, one hundred sixty-seven".