66161300 has 18 divisors (see below), whose sum is σ = 143570238. Its totient is φ = 26464480.

The previous prime is 66161281. The next prime is 66161321. The reversal of 66161300 is 316166.

66161300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 583696 + 65577604 = 764^2 + 8098^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330707 + ... + 330906.

Almost surely, 2^66161300 is an apocalyptic number.

It is an amenable number.

66161300 is an abundant number, since it is smaller than the sum of its proper divisors (77408938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66161300 is a wasteful number, since it uses less digits than its factorization.

66161300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661627 (or 661620 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 66161300 is about 8133.9596753365. The cubic root of 66161300 is about 404.4529524189.

Adding to 66161300 its reverse (316166), we get a palindrome (66477466).

The spelling of 66161300 in words is "sixty-six million, one hundred sixty-one thousand, three hundred".