66667400074068 has 96 divisors (see below), whose sum is σ = 166354060642560. Its totient is φ = 20728548572160.

The previous prime is 66667400074063. The next prime is 66667400074069. The reversal of 66667400074068 is 86047000476666.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66667400074063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23997078 + ... + 26630706.

It is an arithmetic number, because the mean of its divisors is an integer number (1732854798360).

Almost surely, 2^{66667400074068} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66667400074068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83177030321280).

66667400074068 is an abundant number, since it is smaller than the sum of its proper divisors (99686660568492).

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

66667400074068 is a wasteful number, since it uses less digits than its factorization.

66667400074068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635937 (or 2635935 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 60.

The spelling of 66667400074068 in words is "sixty-six trillion, six hundred sixty-seven billion, four hundred million, seventy-four thousand, sixty-eight".