80447766 has 16 divisors (see below), whose sum is σ = 183880704. Its totient is φ = 22985064.

The previous prime is 80447761. The next prime is 80447789. The reversal of 80447766 is 66774408.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1915423 = 80447766 / (8 + 0 + 4 + 4 + 7 + 7 + 6 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80447761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957670 + ... + 957753.

It is an arithmetic number, because the mean of its divisors is an integer number (11492544).

Almost surely, 2^80447766 is an apocalyptic number.

80447766 is an abundant number, since it is smaller than the sum of its proper divisors (103432938).

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

80447766 is a wasteful number, since it uses less digits than its factorization.

80447766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915435.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 80447766 is about 8969.2678630979. The cubic root of 80447766 is about 431.6893449887.

The spelling of 80447766 in words is "eighty million, four hundred forty-seven thousand, seven hundred sixty-six".