66645010 has 8 divisors (see below), whose sum is σ = 119961036. Its totient is φ = 26658000.

The previous prime is 66644999. The next prime is 66645031. The reversal of 66645010 is 1054666.

It can be written as a sum of positive squares in 2 ways, for example, as 63536841 + 3108169 = 7971^2 + 1763^2 .

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 66645010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332241 + ... + 3332260.

Almost surely, 2^66645010 is an apocalyptic number.

66645010 is a deficient number, since it is larger than the sum of its proper divisors (53316026).

66645010 is a wasteful number, since it uses less digits than its factorization.

66645010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664508.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66645010 is about 8163.6395069846. The cubic root of 66645010 is about 405.4362215426.

Adding to 66645010 its reverse (1054666), we get a palindrome (67699676).

The spelling of 66645010 in words is "sixty-six million, six hundred forty-five thousand, ten".