167505661 has 8 divisors (see below), whose sum is σ = 171023040. Its totient is φ = 164011008.

The previous prime is 167505649. The next prime is 167505677. The reversal of 167505661 is 166505761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 167505661 - 2⁵ = 167505629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 167505661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167505631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9640 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (21377880).

Almost surely, 2^167505661 is an apocalyptic number.

It is an amenable number.

167505661 is a deficient number, since it is larger than the sum of its proper divisors (3517379).

167505661 is a wasteful number, since it uses less digits than its factorization.

167505661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 167505661 is about 12942.3978072071. The cubic root of 167505661 is about 551.2430957087.

The spelling of 167505661 in words is "one hundred sixty-seven million, five hundred five thousand, six hundred sixty-one".