66438102 has 16 divisors (see below), whose sum is σ = 133009920. Its totient is φ = 22123752.

The previous prime is 66438077. The next prime is 66438107. The reversal of 66438102 is 20183466.

It is a self number, because there is not a number n which added to its sum of digits gives 66438102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66438107) 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 7 ways as a sum of consecutive naturals, for example, 1599 + ... + 11637.

It is an arithmetic number, because the mean of its divisors is an integer number (8313120).

Almost surely, 2^66438102 is an apocalyptic number.

66438102 is an abundant number, since it is smaller than the sum of its proper divisors (66571818).

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

66438102 is a wasteful number, since it uses less digits than its factorization.

66438102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11147.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 66438102 is about 8150.9571217128. The cubic root of 66438102 is about 405.0162102946.

The spelling of 66438102 in words is "sixty-six million, four hundred thirty-eight thousand, one hundred two".