51660421445235 has 16 divisors (see below), whose sum is σ = 83072034489600. Its totient is φ = 27413771378400.

The previous prime is 51660421445161. The next prime is 51660421445239. The reversal of 51660421445235 is 53254412406615.

It is not a de Polignac number, because 51660421445235 - 2¹³ = 51660421437043 is a prime.

It is a super-2 number, since 2×51660421445235² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51660421445239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8653333941 + ... + 8653339910.

It is an arithmetic number, because the mean of its divisors is an integer number (5192002155600).

Almost surely, 2^{51660421445235} is an apocalyptic number.

51660421445235 is a deficient number, since it is larger than the sum of its proper divisors (31411613044365).

51660421445235 is a wasteful number, since it uses less digits than its factorization.

51660421445235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17306674058.

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 51660421445235 in words is "fifty-one trillion, six hundred sixty billion, four hundred twenty-one million, four hundred forty-five thousand, two hundred thirty-five".