68006921670 has 48 divisors (see below), whose sum is σ = 181596870000. Its totient is φ = 17645038272.

The previous prime is 68006921659. The next prime is 68006921681. The reversal of 68006921670 is 7612960086.

It is an interprime number because it is at equal distance from previous prime (68006921659) and next prime (68006921681).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10207920 + ... + 10214579.

It is an arithmetic number, because the mean of its divisors is an integer number (3783268125).

Almost surely, 2^68006921670 is an apocalyptic number.

68006921670 is an abundant number, since it is smaller than the sum of its proper divisors (113589948330).

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

68006921670 is a wasteful number, since it uses less digits than its factorization.

68006921670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20422549 (or 20422546 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 68006921670 in words is "sixty-eight billion, six million, nine hundred twenty-one thousand, six hundred seventy".