80620866 has 32 divisors (see below), whose sum is σ = 179974080. Its totient is φ = 26751168.

The previous prime is 80620861. The next prime is 80620873. The reversal of 80620866 is 66802608.

It is a self number, because there is not a number n which added to its sum of digits gives 80620866.

It is not an unprimeable number, because it can be changed into a prime (80620861) 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, 8970 + ... + 15546.

It is an arithmetic number, because the mean of its divisors is an integer number (5624190).

Almost surely, 2^80620866 is an apocalyptic number.

80620866 is an abundant number, since it is smaller than the sum of its proper divisors (99353214).

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

80620866 is a wasteful number, since it uses less digits than its factorization.

80620866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815 (or 6809 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 80620866 is about 8978.9122949275. The cubic root of 80620866 is about 431.9987461383.

The spelling of 80620866 in words is "eighty million, six hundred twenty thousand, eight hundred sixty-six".