68667666782 has 32 divisors (see below), whose sum is σ = 124279281504. Its totient is φ = 28032912000.

The previous prime is 68667666773. The next prime is 68667666797. The reversal of 68667666782 is 28766676686.

It is a happy number.

It is a super-2 number, since 2×68667666782² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3233969 + ... + 3255132.

It is an arithmetic number, because the mean of its divisors is an integer number (3883727547).

Almost surely, 2^68667666782 is an apocalyptic number.

68667666782 is a deficient number, since it is larger than the sum of its proper divisors (55611614722).

68667666782 is a wasteful number, since it uses less digits than its factorization.

68667666782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489164.

The product of its digits is 292626432, while the sum is 68.

The spelling of 68667666782 in words is "sixty-eight billion, six hundred sixty-seven million, six hundred sixty-six thousand, seven hundred eighty-two".