166872633 has 4 divisors (see below), whose sum is σ = 222496848. Its totient is φ = 111248420.

The previous prime is 166872617. The next prime is 166872661. The reversal of 166872633 is 336278661.

166872633 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166872633 - 2⁴ = 166872617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166872533) 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, 27812103 + ... + 27812108.

It is an arithmetic number, because the mean of its divisors is an integer number (55624212).

Almost surely, 2^166872633 is an apocalyptic number.

It is an amenable number.

166872633 is a deficient number, since it is larger than the sum of its proper divisors (55624215).

166872633 is an equidigital number, since it uses as much as digits as its factorization.

166872633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55624214.

The product of its digits is 217728, while the sum is 42.

The square root of 166872633 is about 12917.9190661654. The cubic root of 166872633 is about 550.5478101128.

The spelling of 166872633 in words is "one hundred sixty-six million, eight hundred seventy-two thousand, six hundred thirty-three".