68420667386 has 8 divisors (see below), whose sum is σ = 102669635700. Its totient is φ = 34197455488.

The previous prime is 68420667379. The next prime is 68420667391. The reversal of 68420667386 is 68376602486.

It can be written as a sum of positive squares in 2 ways, for example, as 68418341761 + 2325625 = 261569^2 + 1525^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6432461 + ... + 6443088.

Almost surely, 2^68420667386 is an apocalyptic number.

68420667386 is a deficient number, since it is larger than the sum of its proper divisors (34248968314).

68420667386 is a wasteful number, since it uses less digits than its factorization.

68420667386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12878208.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 68420667386 in words is "sixty-eight billion, four hundred twenty million, six hundred sixty-seven thousand, three hundred eighty-six".