66889190 has 8 divisors (see below), whose sum is σ = 120400560. Its totient is φ = 26755672.

The previous prime is 66889189. The next prime is 66889201. The reversal of 66889190 is 9198866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66889190² = 8948327477712200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3344450 + ... + 3344469.

It is an arithmetic number, because the mean of its divisors is an integer number (15050070).

Almost surely, 2^66889190 is an apocalyptic number.

66889190 is a deficient number, since it is larger than the sum of its proper divisors (53511370).

66889190 is a wasteful number, since it uses less digits than its factorization.

66889190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688926.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 66889190 is about 8178.5811727952. The cubic root of 66889190 is about 405.9307759707.

The spelling of 66889190 in words is "sixty-six million, eight hundred eighty-nine thousand, one hundred ninety".