80166621 has 8 divisors (see below), whose sum is σ = 107119584. Its totient is φ = 53329040.

The previous prime is 80166601. The next prime is 80166623. The reversal of 80166621 is 12666108.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80166621 - 2¹⁸ = 79904477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80166623) 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, 27210 + ... + 30011.

It is an arithmetic number, because the mean of its divisors is an integer number (13389948).

Almost surely, 2^80166621 is an apocalyptic number.

It is an amenable number.

80166621 is a deficient number, since it is larger than the sum of its proper divisors (26952963).

80166621 is a wasteful number, since it uses less digits than its factorization.

80166621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57691.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 80166621 is about 8953.5814621860. The cubic root of 80166621 is about 431.1858756157.

The spelling of 80166621 in words is "eighty million, one hundred sixty-six thousand, six hundred twenty-one".