1266624473 has 2 divisors, whose sum is σ = 1266624474. Its totient is φ = 1266624472.

The previous prime is 1266624433. The next prime is 1266624487. The reversal of 1266624473 is 3744266621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263944704 + 2679769 = 35552^2 + 1637^2 .

It is an emirp because it is prime and its reverse (3744266621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266624473 - 2²⁴ = 1249847257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266624473.

It is not a weakly prime, because it can be changed into another prime (1266624433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633312236 + 633312237.

It is an arithmetic number, because the mean of its divisors is an integer number (633312237).

Almost surely, 2^1266624473 is an apocalyptic number.

It is an amenable number.

1266624473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266624473 is an equidigital number, since it uses as much as digits as its factorization.

1266624473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 41.

The square root of 1266624473 is about 35589.6680653248. The cubic root of 1266624473 is about 1081.9718414777.

The spelling of 1266624473 in words is "one billion, two hundred sixty-six million, six hundred twenty-four thousand, four hundred seventy-three".