51666522 has 32 divisors (see below), whose sum is σ = 107220480. Its totient is φ = 16580160.

The previous prime is 51666499. The next prime is 51666539. The reversal of 51666522 is 22566615.

It is a happy number.

51666522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41988 + ... + 43200.

It is an arithmetic number, because the mean of its divisors is an integer number (3350640).

Almost surely, 2^51666522 is an apocalyptic number.

51666522 is an abundant number, since it is smaller than the sum of its proper divisors (55553958).

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

51666522 is a wasteful number, since it uses less digits than its factorization.

51666522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478.

The product of its digits is 21600, while the sum is 33.

The square root of 51666522 is about 7187.9428211415. The cubic root of 51666522 is about 372.4515126895.

The spelling of 51666522 in words is "fifty-one million, six hundred sixty-six thousand, five hundred twenty-two".