66536363636 has 12 divisors (see below), whose sum is σ = 116441274180. Its totient is φ = 33267428160.

The previous prime is 66536363633. The next prime is 66536363669. The reversal of 66536363636 is 63636363566.

It can be written as a sum of positive squares in 2 ways, for example, as 430811536 + 66105552100 = 20756^2 + 257110^2 .

66536363636 is a modest number, since divided by 363636 gives 66536 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66536363633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41360 + ... + 367128.

It is an arithmetic number, because the mean of its divisors is an integer number (9703439515).

Almost surely, 2^66536363636 is an apocalyptic number.

It is an amenable number.

66536363636 is a deficient number, since it is larger than the sum of its proper divisors (49904910544).

66536363636 is a wasteful number, since it uses less digits than its factorization.

66536363636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376834 (or 376832 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 53.

The spelling of 66536363636 in words is "sixty-six billion, five hundred thirty-six million, three hundred sixty-three thousand, six hundred thirty-six".