51665501665006 has 8 divisors (see below), whose sum is σ = 77931203629320. Its totient is φ = 25688433788568.

The previous prime is 51665501664983. The next prime is 51665501665009. The reversal of 51665501665006 is 60056610556615.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665501665009) 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, 72158521521 + ... + 72158522236.

It is an arithmetic number, because the mean of its divisors is an integer number (9741400453665).

Almost surely, 2^{51665501665006} is an apocalyptic number.

51665501665006 is a deficient number, since it is larger than the sum of its proper divisors (26265701964314).

51665501665006 is a wasteful number, since it uses less digits than its factorization.

51665501665006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144317043938.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 51665501665006 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred one million, six hundred sixty-five thousand, six".