66372940 has 24 divisors (see below), whose sum is σ = 145444320. Its totient is φ = 25394688.

The previous prime is 66372869. The next prime is 66372949. The reversal of 66372940 is 4927366.

It is a self number, because there is not a number n which added to its sum of digits gives 66372940.

It is not an unprimeable number, because it can be changed into a prime (66372949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71685 + ... + 72604.

It is an arithmetic number, because the mean of its divisors is an integer number (6060180).

Almost surely, 2^66372940 is an apocalyptic number.

It is an amenable number.

66372940 is an abundant number, since it is smaller than the sum of its proper divisors (79071380).

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

66372940 is a wasteful number, since it uses less digits than its factorization.

66372940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144321 (or 144319 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 66372940 is about 8146.9589418384. The cubic root of 66372940 is about 404.8837546783.

The spelling of 66372940 in words is "sixty-six million, three hundred seventy-two thousand, nine hundred forty".