66190326616 has 8 divisors (see below), whose sum is σ = 124106862420. Its totient is φ = 33095163304.

The previous prime is 66190326599. The next prime is 66190326617. The reversal of 66190326616 is 61662309166.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×66190326616² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66190326617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4136895406 + ... + 4136895421.

Almost surely, 2^66190326616 is an apocalyptic number.

It is an amenable number.

66190326616 is a deficient number, since it is larger than the sum of its proper divisors (57916535804).

66190326616 is a wasteful number, since it uses less digits than its factorization.

66190326616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273790833 (or 8273790829 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 66190326616 in words is "sixty-six billion, one hundred ninety million, three hundred twenty-six thousand, six hundred sixteen".