80666121 has 4 divisors (see below), whose sum is σ = 107554832. Its totient is φ = 53777412.

The previous prime is 80666111. The next prime is 80666141. The reversal of 80666121 is 12166608.

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 not a de Polignac number, because 80666121 - 2⁹ = 80665609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80666101) 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, 13444351 + ... + 13444356.

It is an arithmetic number, because the mean of its divisors is an integer number (26888708).

Almost surely, 2^80666121 is an apocalyptic number.

It is an amenable number.

80666121 is a deficient number, since it is larger than the sum of its proper divisors (26888711).

80666121 is a wasteful number, since it uses less digits than its factorization.

80666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26888710.

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

The square root of 80666121 is about 8981.4320127695. The cubic root of 80666121 is about 432.0795624635.

The spelling of 80666121 in words is "eighty million, six hundred sixty-six thousand, one hundred twenty-one".