66811852 has 24 divisors (see below), whose sum is σ = 121347072. Its totient is φ = 32163600.

The previous prime is 66811841. The next prime is 66811867. The reversal of 66811852 is 25811866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9477 + ... + 14947.

It is an arithmetic number, because the mean of its divisors is an integer number (5056128).

Almost surely, 2^66811852 is an apocalyptic number.

It is an amenable number.

66811852 is a deficient number, since it is larger than the sum of its proper divisors (54535220).

66811852 is a wasteful number, since it uses less digits than its factorization.

66811852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589 (or 5587 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 66811852 is about 8173.8517236368. The cubic root of 66811852 is about 405.7742684621.

The spelling of 66811852 in words is "sixty-six million, eight hundred eleven thousand, eight hundred fifty-two".