66121876 has 12 divisors (see below), whose sum is σ = 116085172. Its totient is φ = 32954688.

The previous prime is 66121873. The next prime is 66121877. The reversal of 66121876 is 67812166.

66121876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 122500 + 65999376 = 350^2 + 8124^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66121871) 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 3 ways as a sum of consecutive naturals, for example, 25155 + ... + 27658.

Almost surely, 2^66121876 is an apocalyptic number.

It is an amenable number.

66121876 is a deficient number, since it is larger than the sum of its proper divisors (49963296).

66121876 is a wasteful number, since it uses less digits than its factorization.

66121876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53130 (or 53128 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 66121876 is about 8131.5358942822. The cubic root of 66121876 is about 404.3726017136.

The spelling of 66121876 in words is "sixty-six million, one hundred twenty-one thousand, eight hundred seventy-six".