1266447730 has 16 divisors (see below), whose sum is σ = 2283422400. Its totient is φ = 505730992.

The previous prime is 1266447713. The next prime is 1266447731. The reversal of 1266447730 is 377446621.

1266447730 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1266447731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99724 + ... + 111703.

It is an arithmetic number, because the mean of its divisors is an integer number (142713900).

Almost surely, 2^1266447730 is an apocalyptic number.

1266447730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266447730 is a deficient number, since it is larger than the sum of its proper divisors (1016974670).

1266447730 is a wasteful number, since it uses less digits than its factorization.

1266447730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212033.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 1266447730 is about 35587.1849125496. The cubic root of 1266447730 is about 1081.9215135263.

The spelling of 1266447730 in words is "one billion, two hundred sixty-six million, four hundred forty-seven thousand, seven hundred thirty".