51666770 has 16 divisors (see below), whose sum is σ = 96000768. Its totient is φ = 19999920.

The previous prime is 51666767. The next prime is 51666773. The reversal of 51666770 is 7766615.

51666770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51666767) and next prime (51666773).

It is not an unprimeable number, because it can be changed into a prime (51666773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83024 + ... + 83643.

It is an arithmetic number, because the mean of its divisors is an integer number (6000048).

Almost surely, 2^51666770 is an apocalyptic number.

51666770 is a deficient number, since it is larger than the sum of its proper divisors (44333998).

51666770 is a wasteful number, since it uses less digits than its factorization.

51666770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166705.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 51666770 is about 7187.9600722319. The cubic root of 51666770 is about 372.4521086126.

The spelling of 51666770 in words is "fifty-one million, six hundred sixty-six thousand, seven hundred seventy".