1266630447 has 16 divisors (see below), whose sum is σ = 1777874688. Its totient is φ = 800553600.

The previous prime is 1266630427. The next prime is 1266630461. The reversal of 1266630447 is 7440366621.

It is a happy number.

It is not a de Polignac number, because 1266630447 - 2⁷ = 1266630319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266630427) 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, 73429 + ... + 89022.

It is an arithmetic number, because the mean of its divisors is an integer number (111117168).

Almost surely, 2^1266630447 is an apocalyptic number.

1266630447 is a deficient number, since it is larger than the sum of its proper divisors (511244241).

1266630447 is a wasteful number, since it uses less digits than its factorization.

1266630447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162590.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 1266630447 is about 35589.7519940783. The cubic root of 1266630447 is about 1081.9735425053.

The spelling of 1266630447 in words is "one billion, two hundred sixty-six million, six hundred thirty thousand, four hundred forty-seven".