623166161 has 8 divisors (see below), whose sum is σ = 694550880. Its totient is φ = 555640128.

The previous prime is 623166157. The next prime is 623166223. The reversal of 623166161 is 161661326.

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 623166161 - 2² = 623166157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623166961) 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, 964331 + ... + 964976.

It is an arithmetic number, because the mean of its divisors is an integer number (86818860).

Almost surely, 2^623166161 is an apocalyptic number.

It is an amenable number.

623166161 is a deficient number, since it is larger than the sum of its proper divisors (71384719).

623166161 is a wasteful number, since it uses less digits than its factorization.

623166161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929343.

The product of its digits is 7776, while the sum is 32.

The square root of 623166161 is about 24963.2962767340. The cubic root of 623166161 is about 854.1509353195.

The spelling of 623166161 in words is "six hundred twenty-three million, one hundred sixty-six thousand, one hundred sixty-one".