80666880 has 144 divisors (see below), whose sum is σ = 294532224. Its totient is φ = 18432000.

The previous prime is 80666879. The next prime is 80666917. The reversal of 80666880 is 8866608.

It is a super-3 number, since 3×80666880³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25380 + ... + 28380.

Almost surely, 2^80666880 is an apocalyptic number.

80666880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80666880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147266112).

80666880 is an abundant number, since it is smaller than the sum of its proper divisors (213865344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80666880 is a wasteful number, since it uses less digits than its factorization.

80666880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 80666880 is about 8981.4742665110. The cubic root of 80666880 is about 432.0809176271.

The spelling of 80666880 in words is "eighty million, six hundred sixty-six thousand, eight hundred eighty".