51606055666 has 8 divisors (see below), whose sum is σ = 84446272944. Its totient is φ = 23457298020.

The previous prime is 51606055621. The next prime is 51606055741. The reversal of 51606055666 is 66655060615.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172864880 + ... + 1172864923.

It is an arithmetic number, because the mean of its divisors is an integer number (10555784118).

Almost surely, 2^51606055666 is an apocalyptic number.

51606055666 is a deficient number, since it is larger than the sum of its proper divisors (32840217278).

51606055666 is a wasteful number, since it uses less digits than its factorization.

51606055666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345729816.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 51606055666 in words is "fifty-one billion, six hundred six million, fifty-five thousand, six hundred sixty-six".