166220043 has 16 divisors (see below), whose sum is σ = 244173312. Its totient is φ = 99740000.

The previous prime is 166220023. The next prime is 166220071. The reversal of 166220043 is 340022661.

It is a cyclic number.

It is not a de Polignac number, because 166220043 - 2⁶ = 166219979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166219995 and 166220022.

It is not an unprimeable number, because it can be changed into a prime (166220003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21603 + ... + 28268.

It is an arithmetic number, because the mean of its divisors is an integer number (15260832).

Almost surely, 2^166220043 is an apocalyptic number.

166220043 is a deficient number, since it is larger than the sum of its proper divisors (77953269).

166220043 is a wasteful number, since it uses less digits than its factorization.

166220043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49986.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 166220043 is about 12892.6352232583. The cubic root of 166220043 is about 549.8291954463.

The spelling of 166220043 in words is "one hundred sixty-six million, two hundred twenty thousand, forty-three".