80666577 has 8 divisors (see below), whose sum is σ = 119506080. Its totient is φ = 53777700.

The previous prime is 80666567. The next prime is 80666587. The reversal of 80666577 is 77566608.

It is an interprime number because it is at equal distance from previous prime (80666567) and next prime (80666587).

It is not a de Polignac number, because 80666577 - 2⁸ = 80666321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80666507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493799 + ... + 1493852.

It is an arithmetic number, because the mean of its divisors is an integer number (14938260).

Almost surely, 2^80666577 is an apocalyptic number.

It is an amenable number.

80666577 is a deficient number, since it is larger than the sum of its proper divisors (38839503).

80666577 is a wasteful number, since it uses less digits than its factorization.

80666577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987660 (or 2987654 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 80666577 is about 8981.4573984404. The cubic root of 80666577 is about 432.0803766339.

The spelling of 80666577 in words is "eighty million, six hundred sixty-six thousand, five hundred seventy-seven".