51906668 has 24 divisors (see below), whose sum is σ = 99437520. Its totient is φ = 23512320.

The previous prime is 51906667. The next prime is 51906707. The reversal of 51906668 is 86660915.

It is not an unprimeable number, because it can be changed into a prime (51906667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11888 + ... + 15656.

It is an arithmetic number, because the mean of its divisors is an integer number (4143230).

Almost surely, 2^51906668 is an apocalyptic number.

It is an amenable number.

51906668 is a deficient number, since it is larger than the sum of its proper divisors (47530852).

51906668 is a wasteful number, since it uses less digits than its factorization.

51906668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 51906668 is about 7204.6282346836. The cubic root of 51906668 is about 373.0276725032.

The spelling of 51906668 in words is "fifty-one million, nine hundred six thousand, six hundred sixty-eight".