1206616566 has 16 divisors (see below), whose sum is σ = 2415904704. Its totient is φ = 401760264.

The previous prime is 1206616561. The next prime is 1206616573. The reversal of 1206616566 is 6656166021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206616561) 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, 105420 + ... + 116303.

It is an arithmetic number, because the mean of its divisors is an integer number (150994044).

Almost surely, 2^1206616566 is an apocalyptic number.

1206616566 is an abundant number, since it is smaller than the sum of its proper divisors (1209288138).

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

1206616566 is a wasteful number, since it uses less digits than its factorization.

1206616566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222635.

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

The square root of 1206616566 is about 34736.3867723746. The cubic root of 1206616566 is about 1064.6080878496.

The spelling of 1206616566 in words is "one billion, two hundred six million, six hundred sixteen thousand, five hundred sixty-six".