515606055666 has 16 divisors (see below), whose sum is σ = 1110536120064. Its totient is φ = 158648017104.

The previous prime is 515606055661. The next prime is 515606055689. The reversal of 515606055666 is 666550606515.

It is not an unprimeable number, because it can be changed into a prime (515606055661) 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, 3305166946 + ... + 3305167101.

It is an arithmetic number, because the mean of its divisors is an integer number (69408507504).

Almost surely, 2^515606055666 is an apocalyptic number.

515606055666 is an abundant number, since it is smaller than the sum of its proper divisors (594930064398).

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

515606055666 is a wasteful number, since it uses less digits than its factorization.

515606055666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610334065.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 515606055666 in words is "five hundred fifteen billion, six hundred six million, fifty-five thousand, six hundred sixty-six".