66620036 has 24 divisors (see below), whose sum is σ = 133948416. Its totient is φ = 28399680.

The previous prime is 66620003. The next prime is 66620053. The reversal of 66620036 is 63002666.

It is a junction number, because it is equal to n+sod(n) for n = 66619990 and 66620008.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881 + ... + 11576.

It is an arithmetic number, because the mean of its divisors is an integer number (5581184).

Almost surely, 2^66620036 is an apocalyptic number.

It is an amenable number.

66620036 is an abundant number, since it is smaller than the sum of its proper divisors (67328380).

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

66620036 is a wasteful number, since it uses less digits than its factorization.

66620036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12659 (or 12657 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 66620036 is about 8162.1097762772. The cubic root of 66620036 is about 405.3855719429.

It can be divided in two parts, 666 and 20036, that added together give a palindrome (20702).

The spelling of 66620036 in words is "sixty-six million, six hundred twenty thousand, thirty-six".