66522430 has 16 divisors (see below), whose sum is σ = 128951424. Its totient is φ = 24562080.

The previous prime is 66522413. The next prime is 66522457. The reversal of 66522430 is 3422566.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 255726 + ... + 255985.

It is an arithmetic number, because the mean of its divisors is an integer number (8059464).

Almost surely, 2^66522430 is an apocalyptic number.

66522430 is a deficient number, since it is larger than the sum of its proper divisors (62428994).

66522430 is a wasteful number, since it uses less digits than its factorization.

66522430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511731.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 66522430 is about 8156.1283707406. The cubic root of 66522430 is about 405.1874963780.

Adding to 66522430 its reverse (3422566), we get a palindrome (69944996).

The spelling of 66522430 in words is "sixty-six million, five hundred twenty-two thousand, four hundred thirty".