66516430 has 32 divisors (see below), whose sum is σ = 124403040. Its totient is φ = 25576320.

The previous prime is 66516419. The next prime is 66516469. The reversal of 66516430 is 3461566.

It is a junction number, because it is equal to n+sod(n) for n = 66516392 and 66516401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100300 + ... + 100960.

It is an arithmetic number, because the mean of its divisors is an integer number (3887595).

Almost surely, 2^66516430 is an apocalyptic number.

66516430 is a deficient number, since it is larger than the sum of its proper divisors (57886610).

66516430 is a wasteful number, since it uses less digits than its factorization.

66516430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66516430 is about 8155.7605408693. The cubic root of 66516430 is about 405.1753140305.

Adding to 66516430 its reverse (3461566), we get a palindrome (69977996).

The spelling of 66516430 in words is "sixty-six million, five hundred sixteen thousand, four hundred thirty".