80772778 has 8 divisors (see below), whose sum is σ = 122619168. Its totient is φ = 39899724.

The previous prime is 80772767. The next prime is 80772779. The reversal of 80772778 is 87727708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (80772779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243126 + ... + 243457.

It is an arithmetic number, because the mean of its divisors is an integer number (15327396).

Almost surely, 2^80772778 is an apocalyptic number.

80772778 is a deficient number, since it is larger than the sum of its proper divisors (41846390).

80772778 is a wasteful number, since it uses less digits than its factorization.

80772778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486668.

The product of its (nonzero) digits is 307328, while the sum is 46.

The square root of 80772778 is about 8987.3676902639. The cubic root of 80772778 is about 432.2699109158.

The spelling of 80772778 in words is "eighty million, seven hundred seventy-two thousand, seven hundred seventy-eight".