68801778 has 32 divisors (see below), whose sum is σ = 155406720. Its totient is φ = 22556880.

The previous prime is 68801713. The next prime is 68801779. The reversal of 68801778 is 87710886.

It is a super-2 number, since 2×68801778² = 9467369311922568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68801779) 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, 7150 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (4856460).

Almost surely, 2^68801778 is an apocalyptic number.

68801778 is an abundant number, since it is smaller than the sum of its proper divisors (86604942).

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

68801778 is a wasteful number, since it uses less digits than its factorization.

68801778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20959 (or 20953 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 68801778 is about 8294.6837191059. The cubic root of 68801778 is about 409.7634526850.

The spelling of 68801778 in words is "sixty-eight million, eight hundred one thousand, seven hundred seventy-eight".