166760645 has 4 divisors (see below), whose sum is σ = 200112780. Its totient is φ = 133408512.

The previous prime is 166760639. The next prime is 166760669. The reversal of 166760645 is 546067661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88774084 + 77986561 = 9422^2 + 8831^2 .

It is a cyclic number.

It is not a de Polignac number, because 166760645 - 2¹² = 166756549 is a prime.

It is a super-2 number, since 2×166760645² = 55618225441632050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16676060 + ... + 16676069.

It is an arithmetic number, because the mean of its divisors is an integer number (50028195).

Almost surely, 2^166760645 is an apocalyptic number.

It is an amenable number.

166760645 is a deficient number, since it is larger than the sum of its proper divisors (33352135).

166760645 is an equidigital number, since it uses as much as digits as its factorization.

166760645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33352134.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 166760645 is about 12913.5837396131. The cubic root of 166760645 is about 550.4246252535.

The spelling of 166760645 in words is "one hundred sixty-six million, seven hundred sixty thousand, six hundred forty-five".