166466031 has 4 divisors (see below), whose sum is σ = 221954712. Its totient is φ = 110977352.

The previous prime is 166466021. The next prime is 166466033. The reversal of 166466031 is 130664661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130664661 = 3 ⋅43554887.

It is a cyclic number.

It is not a de Polignac number, because 166466031 - 2⁶ = 166465967 is a prime.

It is a super-2 number, since 2×166466031² = 55421878953785922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166465983 and 166466001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166466033) 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, 27744336 + ... + 27744341.

It is an arithmetic number, because the mean of its divisors is an integer number (55488678).

Almost surely, 2^166466031 is an apocalyptic number.

166466031 is a deficient number, since it is larger than the sum of its proper divisors (55488681).

166466031 is an equidigital number, since it uses as much as digits as its factorization.

166466031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55488680.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 166466031 is about 12902.1715614078. The cubic root of 166466031 is about 550.1002913528.

The spelling of 166466031 in words is "one hundred sixty-six million, four hundred sixty-six thousand, thirty-one".