67682778 has 16 divisors (see below), whose sum is σ = 136115616. Its totient is φ = 22435920.

The previous prime is 67682761. The next prime is 67682779. The reversal of 67682778 is 87728676.

It is a self number, because there is not a number n which added to its sum of digits gives 67682778.

It is not an unprimeable number, because it can be changed into a prime (67682779) 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, 30076 + ... + 32247.

It is an arithmetic number, because the mean of its divisors is an integer number (8507226).

Almost surely, 2^67682778 is an apocalyptic number.

67682778 is an abundant number, since it is smaller than the sum of its proper divisors (68432838).

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

67682778 is a wasteful number, since it uses less digits than its factorization.

67682778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62509.

The product of its digits is 1580544, while the sum is 51.

The square root of 67682778 is about 8226.9543574764. The cubic root of 67682778 is about 407.5298192890.

The spelling of 67682778 in words is "sixty-seven million, six hundred eighty-two thousand, seven hundred seventy-eight".