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166199091 = 3311787087
BaseRepresentation
bin10011110011111…
…11111100110011
3102120201210021220
421321333330303
5320021332331
624254120123
74055445312
oct1171777463
9376653256
10166199091
11858a6923
12477b0043
1328581276
1418104279
15e8ce296
hex9e7ff33

166199091 has 8 divisors (see below), whose sum is σ = 228747264. Its totient is φ = 107225160.

The previous prime is 166199069. The next prime is 166199093. The reversal of 166199091 is 190991661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166199091 - 223 = 157810483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166199093) 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, 893451 + ... + 893636.

It is an arithmetic number, because the mean of its divisors is an integer number (28593408).

Almost surely, 2166199091 is an apocalyptic number.

166199091 is a deficient number, since it is larger than the sum of its proper divisors (62548173).

166199091 is a wasteful number, since it uses less digits than its factorization.

166199091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787121.

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 166199091 is about 12891.8226407285. The cubic root of 166199091 is about 549.8060925257.

The spelling of 166199091 in words is "one hundred sixty-six million, one hundred ninety-nine thousand, ninety-one".

Divisors: 1 3 31 93 1787087 5361261 55399697 166199091