1266216562 has 16 divisors (see below), whose sum is σ = 2134359360. Its totient is φ = 558998352.

The previous prime is 1266216557. The next prime is 1266216577. The reversal of 1266216562 is 2656126621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1058112 + ... + 1059307.

It is an arithmetic number, because the mean of its divisors is an integer number (133397460).

Almost surely, 2^1266216562 is an apocalyptic number.

1266216562 is a deficient number, since it is larger than the sum of its proper divisors (868142798).

1266216562 is a wasteful number, since it uses less digits than its factorization.

1266216562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117457.

The product of its digits is 51840, while the sum is 37.

The square root of 1266216562 is about 35583.9368535861. The cubic root of 1266216562 is about 1081.8556808708.

The spelling of 1266216562 in words is "one billion, two hundred sixty-six million, two hundred sixteen thousand, five hundred sixty-two".