36066257721 has 30 divisors (see below), whose sum is σ = 58339940670. Its totient is φ = 22194611712.

The previous prime is 36066257713. The next prime is 36066257779. The reversal of 36066257721 is 12775266063.

It can be written as a sum of positive squares in 3 ways, for example, as 4247721 + 36062010000 = 2061^2 + 189900^2 .

It is not a de Polignac number, because 36066257721 - 2³ = 36066257713 is a prime.

It is a super-2 number, since 2×36066257721² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36066257701) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1303656 + ... + 1331033.

It is an arithmetic number, because the mean of its divisors is an integer number (1944664689).

Almost surely, 2^36066257721 is an apocalyptic number.

It is an amenable number.

36066257721 is a deficient number, since it is larger than the sum of its proper divisors (22273682949).

36066257721 is a wasteful number, since it uses less digits than its factorization.

36066257721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634727 (or 2634705 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 36066257721 in words is "thirty-six billion, sixty-six million, two hundred fifty-seven thousand, seven hundred twenty-one".