166418542 has 16 divisors (see below), whose sum is σ = 266883552. Its totient is φ = 77552640.

The previous prime is 166418537. The next prime is 166418543. The reversal of 166418542 is 245814661.

It is a super-2 number, since 2×166418542² = 55390262242811528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166418543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20259 + ... + 27262.

It is an arithmetic number, because the mean of its divisors is an integer number (16680222).

Almost surely, 2^166418542 is an apocalyptic number.

166418542 is a deficient number, since it is larger than the sum of its proper divisors (100465010).

166418542 is a wasteful number, since it uses less digits than its factorization.

166418542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47643.

The product of its digits is 46080, while the sum is 37.

The square root of 166418542 is about 12900.3310810227. The cubic root of 166418542 is about 550.0479759803.

The spelling of 166418542 in words is "one hundred sixty-six million, four hundred eighteen thousand, five hundred forty-two".