51066699 has 24 divisors (see below), whose sum is σ = 73133712. Its totient is φ = 31682880.

The previous prime is 51066667. The next prime is 51066707. The reversal of 51066699 is 99666015.

It is not a de Polignac number, because 51066699 - 2⁵ = 51066667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51066699.

It is not an unprimeable number, because it can be changed into a prime (51066619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65677 + ... + 66449.

It is an arithmetic number, because the mean of its divisors is an integer number (3047238).

Almost surely, 2^51066699 is an apocalyptic number.

51066699 is a deficient number, since it is larger than the sum of its proper divisors (22067013).

51066699 is a wasteful number, since it uses less digits than its factorization.

51066699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 51066699 is about 7146.0967667672. The cubic root of 51066699 is about 371.0045722247.

The spelling of 51066699 in words is "fifty-one million, sixty-six thousand, six hundred ninety-nine".