166233331 has 4 divisors (see below), whose sum is σ = 181345464. Its totient is φ = 151121200.

The previous prime is 166233289. The next prime is 166233349. The reversal of 166233331 is 133332661.

166233331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166233331 - 2⁷ = 166233203 is a prime.

It is a super-2 number, since 2×166233331² = 55267040670711122, which contains 22 as substring.

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 166233331.

It is not an unprimeable number, because it can be changed into a prime (166233391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7556050 + ... + 7556071.

It is an arithmetic number, because the mean of its divisors is an integer number (45336366).

Almost surely, 2^166233331 is an apocalyptic number.

166233331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166233331 is a deficient number, since it is larger than the sum of its proper divisors (15112133).

166233331 is a wasteful number, since it uses less digits than its factorization.

166233331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15112132.

The product of its digits is 5832, while the sum is 28.

The square root of 166233331 is about 12893.1505459294. The cubic root of 166233331 is about 549.8438465789.

Adding to 166233331 its reverse (133332661), we get a palindrome (299565992).

The spelling of 166233331 in words is "one hundred sixty-six million, two hundred thirty-three thousand, three hundred thirty-one".