66724073163726 has 32 divisors (see below), whose sum is σ = 150599788963200. Its totient is φ = 19522194864480.

The previous prime is 66724073163589. The next prime is 66724073163763. The reversal of 66724073163726 is 62736137042766.

It is a self number, because there is not a number n which added to its sum of digits gives 66724073163726.

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, 17430529216 + ... + 17430533043.

It is an arithmetic number, because the mean of its divisors is an integer number (4706243405100).

Almost surely, 2^{66724073163726} is an apocalyptic number.

66724073163726 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66724073163726 is an abundant number, since it is smaller than the sum of its proper divisors (83875715799474).

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

66724073163726 is a wasteful number, since it uses less digits than its factorization.

66724073163726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34861062304.

The product of its (nonzero) digits is 64012032, while the sum is 60.

The spelling of 66724073163726 in words is "sixty-six trillion, seven hundred twenty-four billion, seventy-three million, one hundred sixty-three thousand, seven hundred twenty-six".