166043039 has 4 divisors (see below), whose sum is σ = 166117200. Its totient is φ = 165968880.

The previous prime is 166043027. The next prime is 166043083. The reversal of 166043039 is 930340661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930340661 = 2729 ⋅340909.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166043039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166042996 and 166043014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166043089) 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, 33614 + ... + 38235.

It is an arithmetic number, because the mean of its divisors is an integer number (41529300).

Almost surely, 2^166043039 is an apocalyptic number.

166043039 is a deficient number, since it is larger than the sum of its proper divisors (74161).

166043039 is an equidigital number, since it uses as much as digits as its factorization.

166043039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74160.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 166043039 is about 12885.7688556019. The cubic root of 166043039 is about 549.6339591982.

The spelling of 166043039 in words is "one hundred sixty-six million, forty-three thousand, thirty-nine".