66418430 has 32 divisors (see below), whose sum is σ = 132910848. Its totient is φ = 23731200.

The previous prime is 66418427. The next prime is 66418489. The reversal of 66418430 is 3481466.

It is a super-2 number, since 2×66418430² = 8822815687329800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4211 + ... + 12270.

It is an arithmetic number, because the mean of its divisors is an integer number (4153464).

Almost surely, 2^66418430 is an apocalyptic number.

66418430 is an abundant number, since it is smaller than the sum of its proper divisors (66492418).

66418430 is a wasteful number, since it uses less digits than its factorization.

66418430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16532.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 66418430 is about 8149.7503029234. The cubic root of 66418430 is about 404.9762319029.

Adding to 66418430 its reverse (3481466), we get a palindrome (69899896).

The spelling of 66418430 in words is "sixty-six million, four hundred eighteen thousand, four hundred thirty".