80664661 has 16 divisors (see below), whose sum is σ = 100892160. Its totient is φ = 62653680.

The previous prime is 80664593. The next prime is 80664673. The reversal of 80664661 is 16646608.

It is a cyclic number.

It is not a de Polignac number, because 80664661 - 2⁷ = 80664533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80664661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80664061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25210 + ... + 28228.

It is an arithmetic number, because the mean of its divisors is an integer number (6305760).

Almost surely, 2^80664661 is an apocalyptic number.

It is an amenable number.

80664661 is a deficient number, since it is larger than the sum of its proper divisors (20227499).

80664661 is a wasteful number, since it uses less digits than its factorization.

80664661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 80664661 is about 8981.3507336035. The cubic root of 80664661 is about 432.0769556692.

The spelling of 80664661 in words is "eighty million, six hundred sixty-four thousand, six hundred sixty-one".