166402311 has 8 divisors (see below), whose sum is σ = 221929344. Its totient is φ = 110905080.

The previous prime is 166402297. The next prime is 166402337. The reversal of 166402311 is 113204661.

166402311 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 not a de Polignac number, because 166402311 - 2⁵ = 166402279 is a prime.

It is a super-2 number, since 2×166402311² = 55379458212281442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166402111) 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, 18126 + ... + 25716.

It is an arithmetic number, because the mean of its divisors is an integer number (27741168).

Almost surely, 2^166402311 is an apocalyptic number.

166402311 is a deficient number, since it is larger than the sum of its proper divisors (55527033).

166402311 is an equidigital number, since it uses as much as digits as its factorization.

166402311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14901.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 166402311 is about 12899.7019733016. The cubic root of 166402311 is about 550.0300931193.

Adding to 166402311 its reverse (113204661), we get a palindrome (279606972).

The spelling of 166402311 in words is "one hundred sixty-six million, four hundred two thousand, three hundred eleven".