51666702004 has 48 divisors (see below), whose sum is σ = 96438988800. Its totient is φ = 24163410656.

The previous prime is 51666702001. The next prime is 51666702023. The reversal of 51666702004 is 40020766615.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51666702001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5698827 + ... + 5707885.

It is an arithmetic number, because the mean of its divisors is an integer number (2009145600).

Almost surely, 2^51666702004 is an apocalyptic number.

It is an amenable number.

51666702004 is a deficient number, since it is larger than the sum of its proper divisors (44772286796).

51666702004 is a wasteful number, since it uses less digits than its factorization.

51666702004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10452 (or 10450 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 51666702004 in words is "fifty-one billion, six hundred sixty-six million, seven hundred two thousand, four".