66730651726 has 16 divisors (see below), whose sum is σ = 102292977600. Its totient is φ = 32640742368.

The previous prime is 66730651717. The next prime is 66730651829. The reversal of 66730651726 is 62715603766.

It is a self number, because there is not a number n which added to its sum of digits gives 66730651726.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1920145 + ... + 1954588.

It is an arithmetic number, because the mean of its divisors is an integer number (6393311100).

Almost surely, 2^66730651726 is an apocalyptic number.

66730651726 is a deficient number, since it is larger than the sum of its proper divisors (35562325874).

66730651726 is a wasteful number, since it uses less digits than its factorization.

66730651726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3874923.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 66730651726 in words is "sixty-six billion, seven hundred thirty million, six hundred fifty-one thousand, seven hundred twenty-six".