66473870 has 24 divisors (see below), whose sum is σ = 121523976. Its totient is φ = 26176368.

The previous prime is 66473851. The next prime is 66473881. The reversal of 66473870 is 7837466.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234749 + ... + 235031.

It is an arithmetic number, because the mean of its divisors is an integer number (5063499).

Almost surely, 2^66473870 is an apocalyptic number.

66473870 is a deficient number, since it is larger than the sum of its proper divisors (55050106).

66473870 is an equidigital number, since it uses as much as digits as its factorization.

66473870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 66473870 is about 8153.1509246426. The cubic root of 66473870 is about 405.0888795434.

The spelling of 66473870 in words is "sixty-six million, four hundred seventy-three thousand, eight hundred seventy".