51679668 has 12 divisors (see below), whose sum is σ = 120585920. Its totient is φ = 17226552.

The previous prime is 51679657. The next prime is 51679669. The reversal of 51679668 is 86697615.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51679669) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2153308 + ... + 2153331.

Almost surely, 2^51679668 is an apocalyptic number.

It is an amenable number.

51679668 is an abundant number, since it is smaller than the sum of its proper divisors (68906252).

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

51679668 is a wasteful number, since it uses less digits than its factorization.

51679668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306646 (or 4306644 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 51679668 is about 7188.8572109898. The cubic root of 51679668 is about 372.4830987932.

The spelling of 51679668 in words is "fifty-one million, six hundred seventy-nine thousand, six hundred sixty-eight".