66068646 has 32 divisors (see below), whose sum is σ = 152113920. Its totient is φ = 18739296.

The previous prime is 66068623. The next prime is 66068659. The reversal of 66068646 is 64686066.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66068598 and 66068607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180 + ... + 11496.

It is an arithmetic number, because the mean of its divisors is an integer number (4753560).

Almost surely, 2^66068646 is an apocalyptic number.

66068646 is an abundant number, since it is smaller than the sum of its proper divisors (86045274).

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

66068646 is a wasteful number, since it uses less digits than its factorization.

66068646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11468.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 66068646 is about 8128.2621758898. The cubic root of 66068646 is about 404.2640620819.

The spelling of 66068646 in words is "sixty-six million, sixty-eight thousand, six hundred forty-six".