80661170 has 16 divisors (see below), whose sum is σ = 145513368. Its totient is φ = 32192640.

The previous prime is 80661157. The next prime is 80661181. The reversal of 80661170 is 7116608.

It can be written as a sum of positive squares in 4 ways, for example, as 29495761 + 51165409 = 5431^2 + 7153^2 .

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, 4139 + ... + 13358.

Almost surely, 2^80661170 is an apocalyptic number.

80661170 is a deficient number, since it is larger than the sum of its proper divisors (64852198).

80661170 is a wasteful number, since it uses less digits than its factorization.

80661170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17965.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 80661170 is about 8981.1563843416. The cubic root of 80661170 is about 432.0707224464.

Adding to 80661170 its reverse (7116608), we get a palindrome (87777778).

The spelling of 80661170 in words is "eighty million, six hundred sixty-one thousand, one hundred seventy".