80067661 has 4 divisors (see below), whose sum is σ = 81424800. Its totient is φ = 78710524.

The previous prime is 80067607. The next prime is 80067679. The reversal of 80067661 is 16676008.

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 80067661 - 2¹⁷ = 79936589 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 (80067961) 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, 678481 + ... + 678598.

It is an arithmetic number, because the mean of its divisors is an integer number (20356200).

Almost surely, 2^80067661 is an apocalyptic number.

It is an amenable number.

80067661 is a deficient number, since it is larger than the sum of its proper divisors (1357139).

80067661 is a wasteful number, since it uses less digits than its factorization.

80067661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357138.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 80067661 is about 8948.0534754772. The cubic root of 80067661 is about 431.0083797805.

The spelling of 80067661 in words is "eighty million, sixty-seven thousand, six hundred sixty-one".