51668798 has 24 divisors (see below), whose sum is σ = 80840592. Its totient is φ = 24764544.

The previous prime is 51668791. The next prime is 51668819. The reversal of 51668798 is 89786615.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51668791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309311 + ... + 309477.

It is an arithmetic number, because the mean of its divisors is an integer number (3368358).

Almost surely, 2^51668798 is an apocalyptic number.

51668798 is a deficient number, since it is larger than the sum of its proper divisors (29171794).

51668798 is a wasteful number, since it uses less digits than its factorization.

51668798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 319 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 51668798 is about 7188.1011400787. The cubic root of 51668798 is about 372.4569816544.

The spelling of 51668798 in words is "fifty-one million, six hundred sixty-eight thousand, seven hundred ninety-eight".