66311725694 has 16 divisors (see below), whose sum is σ = 104879324880. Its totient is φ = 31357837440.

The previous prime is 66311725691. The next prime is 66311725741. The reversal of 66311725694 is 49652711366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66311725691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1448837 + ... + 1493904.

It is an arithmetic number, because the mean of its divisors is an integer number (6554957805).

Almost surely, 2^66311725694 is an apocalyptic number.

66311725694 is a deficient number, since it is larger than the sum of its proper divisors (38567599186).

66311725694 is a wasteful number, since it uses less digits than its factorization.

66311725694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943355.

The product of its digits is 1632960, while the sum is 50.

The spelling of 66311725694 in words is "sixty-six billion, three hundred eleven million, seven hundred twenty-five thousand, six hundred ninety-four".