66372040 has 32 divisors (see below), whose sum is σ = 170671680. Its totient is φ = 22756032.

The previous prime is 66372013. The next prime is 66372041. The reversal of 66372040 is 4027366.

66372040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (66372041) 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, 118242 + ... + 118801.

It is an arithmetic number, because the mean of its divisors is an integer number (5333490).

Almost surely, 2^66372040 is an apocalyptic number.

It is an amenable number.

66372040 is an abundant number, since it is smaller than the sum of its proper divisors (104299640).

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

66372040 is a wasteful number, since it uses less digits than its factorization.

66372040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237061 (or 237057 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 66372040 is about 8146.9037063169. The cubic root of 66372040 is about 404.8819246301.

The spelling of 66372040 in words is "sixty-six million, three hundred seventy-two thousand, forty".