1266640095 has 32 divisors (see below), whose sum is σ = 2331509760. Its totient is φ = 575193600.

The previous prime is 1266640093. The next prime is 1266640099. The reversal of 1266640095 is 5900466621.

It is not a de Polignac number, because 1266640095 - 2¹ = 1266640093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266640093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24090 + ... + 55799.

It is an arithmetic number, because the mean of its divisors is an integer number (72859680).

Almost surely, 2^1266640095 is an apocalyptic number.

1266640095 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1266640095 is a deficient number, since it is larger than the sum of its proper divisors (1064869665).

1266640095 is a wasteful number, since it uses less digits than its factorization.

1266640095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80055.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1266640095 is about 35589.8875384568. The cubic root of 1266640095 is about 1081.9762896507.

The spelling of 1266640095 in words is "one billion, two hundred sixty-six million, six hundred forty thousand, ninety-five".