51666503254 has 8 divisors (see below), whose sum is σ = 77501433600. Its totient is φ = 25832692056.

The previous prime is 51666503227. The next prime is 51666503267. The reversal of 51666503254 is 45230566615.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51666503254.

It is a congruent number.

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, 152854 + ... + 355945.

It is an arithmetic number, because the mean of its divisors is an integer number (9687679200).

Almost surely, 2^51666503254 is an apocalyptic number.

51666503254 is a deficient number, since it is larger than the sum of its proper divisors (25834930346).

51666503254 is a wasteful number, since it uses less digits than its factorization.

51666503254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559574.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 51666503254 in words is "fifty-one billion, six hundred sixty-six million, five hundred three thousand, two hundred fifty-four".