1515166866 has 24 divisors (see below), whose sum is σ = 3313546704. Its totient is φ = 500334840.

The previous prime is 1515166853. The next prime is 1515166889. The reversal of 1515166866 is 6686615151.

1515166866 is a `hidden beast` number, since 1 + 51 + 516 + 6 + 86 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391420 + ... + 395271.

It is an arithmetic number, because the mean of its divisors is an integer number (138064446).

Almost surely, 2^1515166866 is an apocalyptic number.

1515166866 is an abundant number, since it is smaller than the sum of its proper divisors (1798379838).

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

1515166866 is a wasteful number, since it uses less digits than its factorization.

1515166866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786806 (or 786803 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1515166866 is about 38925.1443927958. The cubic root of 1515166866 is about 1148.5594731780.

The spelling of 1515166866 in words is "one billion, five hundred fifteen million, one hundred sixty-six thousand, eight hundred sixty-six".