51660206551 has 8 divisors (see below), whose sum is σ = 54511993440. Its totient is φ = 48858893952.

The previous prime is 51660206527. The next prime is 51660206573. The reversal of 51660206551 is 15560206615.

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

It is a cyclic number.

It is not a de Polignac number, because 51660206551 - 2¹⁵ = 51660173783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51660206551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51660206501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12616470 + ... + 12620563.

It is an arithmetic number, because the mean of its divisors is an integer number (6813999180).

Almost surely, 2^51660206551 is an apocalyptic number.

51660206551 is a deficient number, since it is larger than the sum of its proper divisors (2851786889).

51660206551 is a wasteful number, since it uses less digits than its factorization.

51660206551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25237145.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 51660206551 in words is "fifty-one billion, six hundred sixty million, two hundred six thousand, five hundred fifty-one".