161166650 has 12 divisors (see below), whose sum is σ = 299770062. Its totient is φ = 64466640.

The previous prime is 161166641. The next prime is 161166667. The reversal of 161166650 is 56661161.

It can be written as a sum of positive squares in 3 ways, for example, as 90992521 + 70174129 = 9539^2 + 8377^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1611617 + ... + 1611716.

Almost surely, 2^161166650 is an apocalyptic number.

161166650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161166650 is a deficient number, since it is larger than the sum of its proper divisors (138603412).

161166650 is a wasteful number, since it uses less digits than its factorization.

161166650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223345 (or 3223340 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 161166650 is about 12695.1427719423. The cubic root of 161166650 is about 544.1998189138.

The spelling of 161166650 in words is "one hundred sixty-one million, one hundred sixty-six thousand, six hundred fifty".