51966503325 has 36 divisors (see below), whose sum is σ = 101539402848. Its totient is φ = 25195879200.

The previous prime is 51966503321. The next prime is 51966503383. The reversal of 51966503325 is 52330566915.

51966503325 is a `hidden beast` number, since 51 + 9 + 66 + 503 + 32 + 5 = 666.

It is not a de Polignac number, because 51966503325 - 2² = 51966503321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51966503321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10495809 + ... + 10500758.

It is an arithmetic number, because the mean of its divisors is an integer number (2820538968).

Almost surely, 2^51966503325 is an apocalyptic number.

51966503325 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51966503325 is a deficient number, since it is larger than the sum of its proper divisors (49572899523).

51966503325 is a wasteful number, since it uses less digits than its factorization.

51966503325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20996594 (or 20996586 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 45.

The spelling of 51966503325 in words is "fifty-one billion, nine hundred sixty-six million, five hundred three thousand, three hundred twenty-five".