80008661 has 4 divisors (see below), whose sum is σ = 81364800. Its totient is φ = 78652524.

The previous prime is 80008627. The next prime is 80008699. The reversal of 80008661 is 16680008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80008661 - 2²⁶ = 12899797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80008561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677981 + ... + 678098.

It is an arithmetic number, because the mean of its divisors is an integer number (20341200).

Almost surely, 2^80008661 is an apocalyptic number.

It is an amenable number.

80008661 is a deficient number, since it is larger than the sum of its proper divisors (1356139).

80008661 is a wasteful number, since it uses less digits than its factorization.

80008661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356138.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 80008661 is about 8944.7560615145. The cubic root of 80008661 is about 430.9024870776.

Adding to 80008661 its reverse (16680008), we get a palindrome (96688669).

It can be divided in two parts, 8000 and 8661, that added together give a palindrome (16661).

The spelling of 80008661 in words is "eighty million, eight thousand, six hundred sixty-one".