66057543726 has 8 divisors (see below), whose sum is σ = 132115087464. Its totient is φ = 22019181240.

The previous prime is 66057543709. The next prime is 66057543731. The reversal of 66057543726 is 62734575066.

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

66057543726 is an admirable number.

It is a super-2 number, since 2×66057543726² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 5504795305 + ... + 5504795316.

It is an arithmetic number, because the mean of its divisors is an integer number (16514385933).

Almost surely, 2^66057543726 is an apocalyptic number.

66057543726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66057543726 is a wasteful number, since it uses less digits than its factorization.

66057543726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11009590626.

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 66057543726 in words is "sixty-six billion, fifty-seven million, five hundred forty-three thousand, seven hundred twenty-six".