66366940 has 24 divisors (see below), whose sum is σ = 140379120. Its totient is φ = 26354688.

The previous prime is 66366919. The next prime is 66366941. The reversal of 66366940 is 4966366.

It is a junction number, because it is equal to n+sod(n) for n = 66366893 and 66366902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66366941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9157 + ... + 14716.

It is an arithmetic number, because the mean of its divisors is an integer number (5849130).

Almost surely, 2^66366940 is an apocalyptic number.

It is an amenable number.

66366940 is an abundant number, since it is smaller than the sum of its proper divisors (74012180).

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

66366940 is a wasteful number, since it uses less digits than its factorization.

66366940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24021 (or 24019 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 66366940 is about 8146.5906979546. The cubic root of 66366940 is about 404.8715540448.

The spelling of 66366940 in words is "sixty-six million, three hundred sixty-six thousand, nine hundred forty".