51660507205 has 16 divisors (see below), whose sum is σ = 65741385024. Its totient is φ = 38836788480.

The previous prime is 51660507187. The next prime is 51660507247. The reversal of 51660507205 is 50270506615.

It is not a de Polignac number, because 51660507205 - 2¹¹ = 51660505157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417951 + ... + 527260.

It is an arithmetic number, because the mean of its divisors is an integer number (4108836564).

Almost surely, 2^51660507205 is an apocalyptic number.

It is an amenable number.

51660507205 is a deficient number, since it is larger than the sum of its proper divisors (14080877819).

51660507205 is a wasteful number, since it uses less digits than its factorization.

51660507205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945876.

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 51660507205 in words is "fifty-one billion, six hundred sixty million, five hundred seven thousand, two hundred five".