166401137 has 8 divisors (see below), whose sum is σ = 190498176. Its totient is φ = 142385472.

The previous prime is 166401089. The next prime is 166401143. The reversal of 166401137 is 731104661.

166401137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 166401137 - 2⁶ = 166401073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166401187) 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, 15893 + ... + 24194.

It is an arithmetic number, because the mean of its divisors is an integer number (23812272).

Almost surely, 2^166401137 is an apocalyptic number.

It is an amenable number.

166401137 is a deficient number, since it is larger than the sum of its proper divisors (24097039).

166401137 is an equidigital number, since it uses as much as digits as its factorization.

166401137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40687.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 166401137 is about 12899.6564682940. The cubic root of 166401137 is about 550.0287995939.

Adding to 166401137 its reverse (731104661), we get a palindrome (897505798).

The spelling of 166401137 in words is "one hundred sixty-six million, four hundred one thousand, one hundred thirty-seven".