66940382 has 16 divisors (see below), whose sum is σ = 106088400. Its totient is φ = 31590720.

The previous prime is 66940369. The next prime is 66940387. The reversal of 66940382 is 28304966.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66940387) 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, 7544 + ... + 13812.

It is an arithmetic number, because the mean of its divisors is an integer number (6630525).

Almost surely, 2^66940382 is an apocalyptic number.

66940382 is a deficient number, since it is larger than the sum of its proper divisors (39148018).

66940382 is a wasteful number, since it uses less digits than its factorization.

66940382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 66940382 is about 8181.7102124189. The cubic root of 66940382 is about 406.0343059495.

The spelling of 66940382 in words is "sixty-six million, nine hundred forty thousand, three hundred eighty-two".