51684668 has 12 divisors (see below), whose sum is σ = 103369392. Its totient is φ = 22150560.

The previous prime is 51684623. The next prime is 51684683. The reversal of 51684668 is 86648615.

51684668 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922913 + ... + 922968.

It is an arithmetic number, because the mean of its divisors is an integer number (8614116).

Almost surely, 2^51684668 is an apocalyptic number.

It is an amenable number.

51684668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51684668 is a wasteful number, since it uses less digits than its factorization.

51684668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845892 (or 1845890 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 51684668 is about 7189.2049629983. The cubic root of 51684668 is about 372.4951109669.

It can be divided in two parts, 516 and 84668, that added together give a cube (85184 = 44³).

The spelling of 51684668 in words is "fifty-one million, six hundred eighty-four thousand, six hundred sixty-eight".