167666761 has 4 divisors (see below), whose sum is σ = 171566032. Its totient is φ = 163767492.

The previous prime is 167666749. The next prime is 167666771.

It is a happy number.

167666761 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 167666761 - 2⁵ = 167666729 is a prime.

It is a super-2 number, since 2×167666761² = 56224285488462242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167666771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1949571 + ... + 1949656.

It is an arithmetic number, because the mean of its divisors is an integer number (42891508).

Almost surely, 2^167666761 is an apocalyptic number.

It is an amenable number.

167666761 is a deficient number, since it is larger than the sum of its proper divisors (3899271).

167666761 is an equidigital number, since it uses as much as digits as its factorization.

167666761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899270.

The product of its digits is 381024, while the sum is 46.

The square root of 167666761 is about 12948.6200423057. The cubic root of 167666761 is about 551.4197600030.

The spelling of 167666761 in words is "one hundred sixty-seven million, six hundred sixty-six thousand, seven hundred sixty-one".