80668215 has 48 divisors (see below), whose sum is σ = 146285568. Its totient is φ = 41082048.

The previous prime is 80668193. The next prime is 80668219. The reversal of 80668215 is 51286608.

It is a happy number.

It is not a de Polignac number, because 80668215 - 2⁵ = 80668183 is a prime.

It is a super-2 number, since 2×80668215² = 13014721822572450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80668215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80668219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90502 + ... + 91388.

It is an arithmetic number, because the mean of its divisors is an integer number (3047616).

Almost surely, 2^80668215 is an apocalyptic number.

80668215 is a deficient number, since it is larger than the sum of its proper divisors (65617353).

80668215 is a wasteful number, since it uses less digits than its factorization.

80668215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 80668215 is about 8981.5485858509. The cubic root of 80668215 is about 432.0833011945.

The spelling of 80668215 in words is "eighty million, six hundred sixty-eight thousand, two hundred fifteen".