1266640948 has 24 divisors (see below), whose sum is σ = 2237243904. Its totient is φ = 627456000.

The previous prime is 1266640937. The next prime is 1266640951. The reversal of 1266640948 is 8490466621.

It is a junction number, because it is equal to n+sod(n) for n = 1266640898 and 1266640907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193123 + ... + 199573.

It is an arithmetic number, because the mean of its divisors is an integer number (93218496).

Almost surely, 2^1266640948 is an apocalyptic number.

It is an amenable number.

1266640948 is a deficient number, since it is larger than the sum of its proper divisors (970602956).

1266640948 is a wasteful number, since it uses less digits than its factorization.

1266640948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6903 (or 6901 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 1266640948 is about 35589.8995221959. The cubic root of 1266640948 is about 1081.9765325310.

The spelling of 1266640948 in words is "one billion, two hundred sixty-six million, six hundred forty thousand, nine hundred forty-eight".