1516565666 has 16 divisors (see below), whose sum is σ = 2836175040. Its totient is φ = 590869680.

The previous prime is 1516565653. The next prime is 1516565669. The reversal of 1516565666 is 6665656151.

It is a self number, because there is not a number n which added to its sum of digits gives 1516565666.

It is not an unprimeable number, because it can be changed into a prime (1516565669) 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, 4923761 + ... + 4924068.

It is an arithmetic number, because the mean of its divisors is an integer number (177260940).

Almost surely, 2^1516565666 is an apocalyptic number.

1516565666 is a deficient number, since it is larger than the sum of its proper divisors (1319609374).

1516565666 is a wasteful number, since it uses less digits than its factorization.

1516565666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9847849.

The product of its digits is 972000, while the sum is 47.

The square root of 1516565666 is about 38943.1080680523. The cubic root of 1516565666 is about 1148.9128139828.

The spelling of 1516565666 in words is "one billion, five hundred sixteen million, five hundred sixty-five thousand, six hundred sixty-six".