66300438 has 16 divisors (see below), whose sum is σ = 137173680. Its totient is φ = 21338016.

The previous prime is 66300431. The next prime is 66300463. The reversal of 66300438 is 83400366.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66300431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190345 + ... + 190692.

It is an arithmetic number, because the mean of its divisors is an integer number (8573355).

Almost surely, 2^66300438 is an apocalyptic number.

66300438 is an abundant number, since it is smaller than the sum of its proper divisors (70873242).

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

66300438 is a wasteful number, since it uses less digits than its factorization.

66300438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381071.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66300438 is about 8142.5080902631. The cubic root of 66300438 is about 404.7362770214.

The spelling of 66300438 in words is "sixty-six million, three hundred thousand, four hundred thirty-eight".