80778670 has 32 divisors (see below), whose sum is σ = 168998400. Its totient is φ = 27224736.

The previous prime is 80778667. The next prime is 80778673. The reversal of 80778670 is 7687708.

It is an interprime number because it is at equal distance from previous prime (80778667) and next prime (80778673).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80778673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5650 + ... + 13909.

It is an arithmetic number, because the mean of its divisors is an integer number (5281200).

Almost surely, 2^80778670 is an apocalyptic number.

80778670 is an abundant number, since it is smaller than the sum of its proper divisors (88219730).

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

80778670 is a wasteful number, since it uses less digits than its factorization.

80778670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19632.

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 80778670 is about 8987.6954777073. The cubic root of 80778670 is about 432.2804213562.

The spelling of 80778670 in words is "eighty million, seven hundred seventy-eight thousand, six hundred seventy".