66908706254 has 16 divisors (see below), whose sum is σ = 108087595728. Its totient is φ = 30879712512.

The previous prime is 66908706251. The next prime is 66908706259. The reversal of 66908706254 is 45260780966.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66908706196 and 66908706205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66908706251) 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, 1121609 + ... + 1179755.

It is an arithmetic number, because the mean of its divisors is an integer number (6755474733).

Almost surely, 2^66908706254 is an apocalyptic number.

66908706254 is a deficient number, since it is larger than the sum of its proper divisors (41178889474).

66908706254 is a wasteful number, since it uses less digits than its factorization.

66908706254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102419.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 66908706254 in words is "sixty-six billion, nine hundred eight million, seven hundred six thousand, two hundred fifty-four".