66170802 has 32 divisors (see below), whose sum is σ = 139958784. Its totient is φ = 20822400.

The previous prime is 66170791. The next prime is 66170807. The reversal of 66170802 is 20807166.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66170802.

It is not an unprimeable number, because it can be changed into a prime (66170807) 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 15 ways as a sum of consecutive naturals, for example, 3288 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (4373712).

Almost surely, 2^66170802 is an apocalyptic number.

66170802 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66170802 is an abundant number, since it is smaller than the sum of its proper divisors (73787982).

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

66170802 is a wasteful number, since it uses less digits than its factorization.

66170802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8754.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 66170802 is about 8134.5437487299. The cubic root of 66170802 is about 404.4723138280.

Adding to 66170802 its reverse (20807166), we get a palindrome (86977968).

The spelling of 66170802 in words is "sixty-six million, one hundred seventy thousand, eight hundred two".