66201040 has 40 divisors (see below), whose sum is σ = 154275840. Its totient is φ = 26418816.

The previous prime is 66201017. The next prime is 66201053. The reversal of 66201040 is 4010266.

66201040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 66200999 and 66201017.

It is a congruent number.

It is an unprimeable number.

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, 51121 + ... + 52399.

It is an arithmetic number, because the mean of its divisors is an integer number (3856896).

Almost surely, 2^66201040 is an apocalyptic number.

It is an amenable number.

66201040 is an abundant number, since it is smaller than the sum of its proper divisors (88074800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66201040 is a wasteful number, since it uses less digits than its factorization.

66201040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1933 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 66201040 is about 8136.4021532862. The cubic root of 66201040 is about 404.5339148713.

The spelling of 66201040 in words is "sixty-six million, two hundred one thousand, forty".