66682644061 has 8 divisors (see below), whose sum is σ = 72751140000. Its totient is φ = 60615221040.

The previous prime is 66682644043. The next prime is 66682644071. The reversal of 66682644061 is 16044628666.

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

It is not a de Polignac number, because 66682644061 - 2⁹ = 66682643549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66682643996 and 66682644014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66682644001) by changing a digit.

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, 135411 + ... + 389488.

It is an arithmetic number, because the mean of its divisors is an integer number (9093892500).

Almost surely, 2^66682644061 is an apocalyptic number.

It is an amenable number.

66682644061 is a deficient number, since it is larger than the sum of its proper divisors (6068495939).

66682644061 is a wasteful number, since it uses less digits than its factorization.

66682644061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536459.

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 66682644061 in words is "sixty-six billion, six hundred eighty-two million, six hundred forty-four thousand, sixty-one".