166541738 has 24 divisors (see below), whose sum is σ = 276618720. Its totient is φ = 75141000.

The previous prime is 166541729. The next prime is 166541743. The reversal of 166541738 is 837145661.

It is a junction number, because it is equal to n+sod(n) for n = 166541695 and 166541704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31163 + ... + 36113.

It is an arithmetic number, because the mean of its divisors is an integer number (11525780).

Almost surely, 2^166541738 is an apocalyptic number.

166541738 is a deficient number, since it is larger than the sum of its proper divisors (110076982).

166541738 is a wasteful number, since it uses less digits than its factorization.

166541738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114 (or 5103 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 166541738 is about 12905.1051138687. The cubic root of 166541738 is about 550.1836719894.

The spelling of 166541738 in words is "one hundred sixty-six million, five hundred forty-one thousand, seven hundred thirty-eight".