66121100866 has 8 divisors (see below), whose sum is σ = 99184562064. Its totient is φ = 33059580180.

The previous prime is 66121100861. The next prime is 66121100887. The reversal of 66121100866 is 66800112166.

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

It is not an unprimeable number, because it can be changed into a prime (66121100861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396720 + ... + 538171.

It is an arithmetic number, because the mean of its divisors is an integer number (12398070258).

Almost surely, 2^66121100866 is an apocalyptic number.

66121100866 is a deficient number, since it is larger than the sum of its proper divisors (33063461198).

66121100866 is a wasteful number, since it uses less digits than its factorization.

66121100866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970256.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 66121100866 in words is "sixty-six billion, one hundred twenty-one million, one hundred thousand, eight hundred sixty-six".