51666562 has 16 divisors (see below), whose sum is σ = 78304320. Its totient is φ = 25566928.

The previous prime is 51666557. The next prime is 51666577. The reversal of 51666562 is 26566615.

51666562 is nontrivially palindromic in base 3.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143739 + ... + 144097.

It is an arithmetic number, because the mean of its divisors is an integer number (4894020).

Almost surely, 2^51666562 is an apocalyptic number.

51666562 is a deficient number, since it is larger than the sum of its proper divisors (26637758).

51666562 is a wasteful number, since it uses less digits than its factorization.

51666562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905.

The product of its digits is 64800, while the sum is 37.

The square root of 51666562 is about 7187.9456035783. The cubic root of 51666562 is about 372.4516088062.

The spelling of 51666562 in words is "fifty-one million, six hundred sixty-six thousand, five hundred sixty-two".