1266201633 has 16 divisors (see below), whose sum is σ = 1789606656. Its totient is φ = 793578240.

The previous prime is 1266201631. The next prime is 1266201653. The reversal of 1266201633 is 3361026621.

It is not a de Polignac number, because 1266201633 - 2¹ = 1266201631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266201633.

It is not an unprimeable number, because it can be changed into a prime (1266201631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32835 + ... + 60087.

It is an arithmetic number, because the mean of its divisors is an integer number (111850416).

Almost surely, 2^1266201633 is an apocalyptic number.

It is an amenable number.

1266201633 is a deficient number, since it is larger than the sum of its proper divisors (523405023).

1266201633 is a wasteful number, since it uses less digits than its factorization.

1266201633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28184.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1266201633 is about 35583.7270813500. The cubic root of 1266201633 is about 1081.8514290739.

The spelling of 1266201633 in words is "one billion, two hundred sixty-six million, two hundred one thousand, six hundred thirty-three".