166058138 has 16 divisors (see below), whose sum is σ = 262573920. Its totient is φ = 78546096.

The previous prime is 166058117. The next prime is 166058141. The reversal of 166058138 is 831850661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27545 + ... + 33027.

It is an arithmetic number, because the mean of its divisors is an integer number (16410870).

Almost surely, 2^166058138 is an apocalyptic number.

166058138 is a deficient number, since it is larger than the sum of its proper divisors (96515782).

166058138 is a wasteful number, since it uses less digits than its factorization.

166058138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 166058138 is about 12886.3547211770. The cubic root of 166058138 is about 549.6506188780.

The spelling of 166058138 in words is "one hundred sixty-six million, fifty-eight thousand, one hundred thirty-eight".