68405556670 has 16 divisors (see below), whose sum is σ = 134323638768. Its totient is φ = 24874747840.

The previous prime is 68405556649. The next prime is 68405556679. The reversal of 68405556670 is 7665550486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68405556679) 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, 310934239 + ... + 310934458.

It is an arithmetic number, because the mean of its divisors is an integer number (8395227423).

Almost surely, 2^68405556670 is an apocalyptic number.

68405556670 is a deficient number, since it is larger than the sum of its proper divisors (65918082098).

68405556670 is a wasteful number, since it uses less digits than its factorization.

68405556670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621868715.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 68405556670 in words is "sixty-eight billion, four hundred five million, five hundred fifty-six thousand, six hundred seventy".