80778668 has 24 divisors (see below), whose sum is σ = 148290912. Its totient is φ = 38428544.

The previous prime is 80778667. The next prime is 80778673. The reversal of 80778668 is 86687708.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (80778667) 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, 15896 + ... + 20352.

It is an arithmetic number, because the mean of its divisors is an integer number (6178788).

Almost surely, 2^80778668 is an apocalyptic number.

It is an amenable number.

80778668 is a deficient number, since it is larger than the sum of its proper divisors (67512244).

80778668 is a wasteful number, since it uses less digits than its factorization.

80778668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 80778668 is about 8987.6953664441. The cubic root of 80778668 is about 432.2804177885.

The spelling of 80778668 in words is "eighty million, seven hundred seventy-eight thousand, six hundred sixty-eight".