51660206551000 has 128 divisors (see below), whose sum is σ = 127558064649600. Its totient is φ = 19543557580800.

The previous prime is 51660206550949. The next prime is 51660206551003. The reversal of 51660206551000 is 15560206615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51660206551003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10571517 + ... + 14665516.

It is an arithmetic number, because the mean of its divisors is an integer number (996547380075).

Almost surely, 2^{51660206551000} is an apocalyptic number.

51660206551000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51660206551000 is an abundant number, since it is smaller than the sum of its proper divisors (75897858098600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51660206551000 is a wasteful number, since it uses less digits than its factorization.

51660206551000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25237166 (or 25237152 counting only the distinct ones).

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

Adding to 51660206551000 its reverse (15560206615), we get a palindrome (51675766757615).

The spelling of 51660206551000 in words is "fifty-one trillion, six hundred sixty billion, two hundred six million, five hundred fifty-one thousand".