66819148036 has 27 divisors (see below), whose sum is σ = 117594962037. Its totient is φ = 33221648880.

The previous prime is 66819148007. The next prime is 66819148049. The reversal of 66819148036 is 63084191866.

The square root of 66819148036 is 258494.

It is a perfect power (a square), and thus also a powerful number.

66819148036 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 only one way, i.e., 317053636 + 66502094400 = 17806^2 + 257880^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 158715106 + ... + 158715526.

Almost surely, 2^66819148036 is an apocalyptic number.

66819148036 is the 258494-th square number.

It is an amenable number.

66819148036 is a deficient number, since it is larger than the sum of its proper divisors (50775814001).

66819148036 is an frugal number, since it uses more digits than its factorization.

66819148036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 66819148036 in words is "sixty-six billion, eight hundred nineteen million, one hundred forty-eight thousand, thirty-six".