66889382 has 32 divisors (see below), whose sum is σ = 123531264. Its totient is φ = 26532000.

The previous prime is 66889369. The next prime is 66889387. The reversal of 66889382 is 28398866.

It is a self number, because there is not a number n which added to its sum of digits gives 66889382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66889387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6632 + ... + 13332.

It is an arithmetic number, because the mean of its divisors is an integer number (3860352).

Almost surely, 2^66889382 is an apocalyptic number.

66889382 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66889382 is a deficient number, since it is larger than the sum of its proper divisors (56641882).

66889382 is a wasteful number, since it uses less digits than its factorization.

66889382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764.

The product of its digits is 995328, while the sum is 50.

The square root of 66889382 is about 8178.5929107641. The cubic root of 66889382 is about 405.9311643675.

The spelling of 66889382 in words is "sixty-six million, eight hundred eighty-nine thousand, three hundred eighty-two".