166142195 has 4 divisors (see below), whose sum is σ = 199370640. Its totient is φ = 132913752.

The previous prime is 166142183. The next prime is 166142203. The reversal of 166142195 is 591241661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 591241661 = 107 ⋅5525623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166142195 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16614215 + ... + 16614224.

It is an arithmetic number, because the mean of its divisors is an integer number (49842660).

Almost surely, 2^166142195 is an apocalyptic number.

166142195 is a deficient number, since it is larger than the sum of its proper divisors (33228445).

166142195 is an equidigital number, since it uses as much as digits as its factorization.

166142195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33228444.

The product of its digits is 12960, while the sum is 35.

The square root of 166142195 is about 12889.6157817058. The cubic root of 166142195 is about 549.7433458172.

The spelling of 166142195 in words is "one hundred sixty-six million, one hundred forty-two thousand, one hundred ninety-five".