4478066261 has 2 divisors, whose sum is σ = 4478066262. Its totient is φ = 4478066260.

The previous prime is 4478066251. The next prime is 4478066279. The reversal of 4478066261 is 1626608744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3614294161 + 863772100 = 60119^2 + 29390^2 .

It is a cyclic number.

It is not a de Polignac number, because 4478066261 - 2²² = 4473871957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4478066221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2239033130 + 2239033131.

It is an arithmetic number, because the mean of its divisors is an integer number (2239033131).

Almost surely, 2^4478066261 is an apocalyptic number.

It is an amenable number.

4478066261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4478066261 is an equidigital number, since it uses as much as digits as its factorization.

4478066261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 4478066261 is about 66918.3551874970. The cubic root of 4478066261 is about 1648.2768985831.

The spelling of 4478066261 in words is "four billion, four hundred seventy-eight million, sixty-six thousand, two hundred sixty-one".