161066810 has 16 divisors (see below), whose sum is σ = 292487976. Its totient is φ = 63856128.

The previous prime is 161066803. The next prime is 161066827. The reversal of 161066810 is 18660161.

It can be written as a sum of positive squares in 4 ways, for example, as 80048809 + 81018001 = 8947^2 + 9001^2 .

It is a super-2 number, since 2×161066810² = 51885034567152200, which contains 22 as substring.

It is a Curzon number.

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, 70139 + ... + 72398.

Almost surely, 2^161066810 is an apocalyptic number.

161066810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161066810 is a deficient number, since it is larger than the sum of its proper divisors (131421166).

161066810 is a wasteful number, since it uses less digits than its factorization.

161066810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142657.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 161066810 is about 12691.2099501978. The cubic root of 161066810 is about 544.0874215221.

The spelling of 161066810 in words is "one hundred sixty-one million, sixty-six thousand, eight hundred ten".