4272345661 has 2 divisors, whose sum is σ = 4272345662. Its totient is φ = 4272345660.

The previous prime is 4272345629. The next prime is 4272345677. The reversal of 4272345661 is 1665432724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3372705625 + 899640036 = 58075^2 + 29994^2 .

It is a cyclic number.

It is not a de Polignac number, because 4272345661 - 2⁵ = 4272345629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4272345061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2136172830 + 2136172831.

It is an arithmetic number, because the mean of its divisors is an integer number (2136172831).

Almost surely, 2^4272345661 is an apocalyptic number.

It is an amenable number.

4272345661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4272345661 is an equidigital number, since it uses as much as digits as its factorization.

4272345661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 40.

The square root of 4272345661 is about 65363.1827636935. The cubic root of 4272345661 is about 1622.6398129285.

The spelling of 4272345661 in words is "four billion, two hundred seventy-two million, three hundred forty-five thousand, six hundred sixty-one".