80663400 has 144 divisors (see below), whose sum is σ = 277755660. Its totient is φ = 20966400.

The previous prime is 80663371. The next prime is 80663477. The reversal of 80663400 is 436608.

It can be written as a sum of positive squares in 6 ways, for example, as 32970564 + 47692836 = 5742^2 + 6906^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 73254 + ... + 74346.

Almost surely, 2^80663400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80663400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138877830).

80663400 is an abundant number, since it is smaller than the sum of its proper divisors (197092260).

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

80663400 is a wasteful number, since it uses less digits than its factorization.

80663400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 80663400 is about 8981.2805323072. The cubic root of 80663400 is about 432.0747041591.

The spelling of 80663400 in words is "eighty million, six hundred sixty-three thousand, four hundred".