4399269661 has 2 divisors, whose sum is σ = 4399269662. Its totient is φ = 4399269660.

The previous prime is 4399269659. The next prime is 4399269683. The reversal of 4399269661 is 1669629934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4314519225 + 84750436 = 65685^2 + 9206^2 .

It is a cyclic number.

It is not a de Polignac number, because 4399269661 - 2¹ = 4399269659 is a prime.

Together with 4399269659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4399269601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2199634830 + 2199634831.

It is an arithmetic number, because the mean of its divisors is an integer number (2199634831).

Almost surely, 2^4399269661 is an apocalyptic number.

It is an amenable number.

4399269661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4399269661 is an equidigital number, since it uses as much as digits as its factorization.

4399269661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 55.

The square root of 4399269661 is about 66326.9904412977. The cubic root of 4399269661 is about 1638.5518722031.

The spelling of 4399269661 in words is "four billion, three hundred ninety-nine million, two hundred sixty-nine thousand, six hundred sixty-one".