66536836 has 12 divisors (see below), whose sum is σ = 118636812. Its totient is φ = 32640608.

The previous prime is 66536807. The next prime is 66536839. The reversal of 66536836 is 63863566.

It can be written as a sum of positive squares in 2 ways, for example, as 19009600 + 47527236 = 4360^2 + 6894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66536792 and 66536801.

It is not an unprimeable number, because it can be changed into a prime (66536839) 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, 156715 + ... + 157138.

It is an arithmetic number, because the mean of its divisors is an integer number (9886401).

Almost surely, 2^66536836 is an apocalyptic number.

It is an amenable number.

66536836 is a deficient number, since it is larger than the sum of its proper divisors (52099976).

66536836 is a wasteful number, since it uses less digits than its factorization.

66536836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313910 (or 313908 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 66536836 is about 8157.0114625395. The cubic root of 66536836 is about 405.2167432038.

The spelling of 66536836 in words is "sixty-six million, five hundred thirty-six thousand, eight hundred thirty-six".