166021927 has 8 divisors (see below), whose sum is σ = 168838560. Its totient is φ = 163218720.

The previous prime is 166021873. The next prime is 166021937. The reversal of 166021927 is 729120661.

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 166021927 - 2²³ = 157633319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166021892 and 166021901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166021937) 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, 23349 + ... + 29617.

It is an arithmetic number, because the mean of its divisors is an integer number (21104820).

Almost surely, 2^166021927 is an apocalyptic number.

166021927 is a deficient number, since it is larger than the sum of its proper divisors (2816633).

166021927 is an equidigital number, since it uses as much as digits as its factorization.

166021927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 166021927 is about 12884.9496312558. The cubic root of 166021927 is about 549.6106633024.

The spelling of 166021927 in words is "one hundred sixty-six million, twenty-one thousand, nine hundred twenty-seven".