51612666 has 32 divisors (see below), whose sum is σ = 118273920. Its totient is φ = 14708736.

The previous prime is 51612661. The next prime is 51612689. The reversal of 51612666 is 66621615.

It is not an unprimeable number, because it can be changed into a prime (51612661) 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, 17850 + ... + 20538.

It is an arithmetic number, because the mean of its divisors is an integer number (3696060).

Almost surely, 2^51612666 is an apocalyptic number.

51612666 is an abundant number, since it is smaller than the sum of its proper divisors (66661254).

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

51612666 is a wasteful number, since it uses less digits than its factorization.

51612666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158.

The product of its digits is 12960, while the sum is 33.

The square root of 51612666 is about 7184.1955708346. The cubic root of 51612666 is about 372.3220560541.

The spelling of 51612666 in words is "fifty-one million, six hundred twelve thousand, six hundred sixty-six".