1266642066 has 16 divisors (see below), whose sum is σ = 2533845600. Its totient is φ = 422120448.

The previous prime is 1266642043. The next prime is 1266642079. The reversal of 1266642066 is 6602466621.

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, 9490 + ... + 51218.

It is an arithmetic number, because the mean of its divisors is an integer number (158365350).

Almost surely, 2^1266642066 is an apocalyptic number.

1266642066 is an abundant number, since it is smaller than the sum of its proper divisors (1267203534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266642066 is a wasteful number, since it uses less digits than its factorization.

1266642066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46793.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 1266642066 is about 35589.9152288960. The cubic root of 1266642066 is about 1081.9768508662.

The spelling of 1266642066 in words is "one billion, two hundred sixty-six million, six hundred forty-two thousand, sixty-six".