66490170 has 32 divisors (see below), whose sum is σ = 159829632. Its totient is φ = 17702592.

The previous prime is 66490163. The next prime is 66490187. The reversal of 66490170 is 7109466.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 23344 + ... + 26036.

It is an arithmetic number, because the mean of its divisors is an integer number (4994676).

Almost surely, 2^66490170 is an apocalyptic number.

66490170 is an abundant number, since it is smaller than the sum of its proper divisors (93339462).

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

66490170 is a wasteful number, since it uses less digits than its factorization.

66490170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 66490170 is about 8154.1504769044. The cubic root of 66490170 is about 405.1219873350.

The spelling of 66490170 in words is "sixty-six million, four hundred ninety thousand, one hundred seventy".