66572830 has 8 divisors (see below), whose sum is σ = 119831112. Its totient is φ = 26629128.

The previous prime is 66572813. The next prime is 66572887. The reversal of 66572830 is 3827566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66572830.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3328632 + ... + 3328651.

It is an arithmetic number, because the mean of its divisors is an integer number (14978889).

Almost surely, 2^66572830 is an apocalyptic number.

66572830 is a deficient number, since it is larger than the sum of its proper divisors (53258282).

66572830 is a wasteful number, since it uses less digits than its factorization.

66572830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657290.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 66572830 is about 8159.2174869898. The cubic root of 66572830 is about 405.2897991884.

The spelling of 66572830 in words is "sixty-six million, five hundred seventy-two thousand, eight hundred thirty".