4266827721 has 12 divisors (see below), whose sum is σ = 6637287748. Its totient is φ = 2625740064.

The previous prime is 4266827713. The next prime is 4266827749. The reversal of 4266827721 is 1277286624.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2052090000 + 2214737721 = 45300^2 + 47061^2 .

It is not a de Polignac number, because 4266827721 - 2³ = 4266827713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4266827711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18234190 + ... + 18234423.

Almost surely, 2^4266827721 is an apocalyptic number.

It is an amenable number.

4266827721 is a deficient number, since it is larger than the sum of its proper divisors (2370460027).

4266827721 is a wasteful number, since it uses less digits than its factorization.

4266827721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36468632 (or 36468629 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 4266827721 is about 65320.9592780143. The cubic root of 4266827721 is about 1621.9409395000.

The spelling of 4266827721 in words is "four billion, two hundred sixty-six million, eight hundred twenty-seven thousand, seven hundred twenty-one".