4072366561 has 4 divisors (see below), whose sum is σ = 4112687124. Its totient is φ = 4032046000.

The previous prime is 4072366547. The next prime is 4072366567. The reversal of 4072366561 is 1656632704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3804422400 + 267944161 = 61680^2 + 16369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4072366561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4072366567) 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, 20160130 + ... + 20160331.

It is an arithmetic number, because the mean of its divisors is an integer number (1028171781).

Almost surely, 2^4072366561 is an apocalyptic number.

It is an amenable number.

4072366561 is a deficient number, since it is larger than the sum of its proper divisors (40320563).

4072366561 is a wasteful number, since it uses less digits than its factorization.

4072366561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40320562.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 4072366561 is about 63815.0966543184. The cubic root of 4072366561 is about 1596.9167917550.

The spelling of 4072366561 in words is "four billion, seventy-two million, three hundred sixty-six thousand, five hundred sixty-one".