1087666815 has 16 divisors (see below), whose sum is σ = 1746556128. Its totient is φ = 577992576.

The previous prime is 1087666813. The next prime is 1087666823. The reversal of 1087666815 is 5186667801.

It is not a de Polignac number, because 1087666815 - 2¹ = 1087666813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087666813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126732 + ... + 135041.

It is an arithmetic number, because the mean of its divisors is an integer number (109159758).

Almost surely, 2^1087666815 is an apocalyptic number.

1087666815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1087666815 is a deficient number, since it is larger than the sum of its proper divisors (658889313).

1087666815 is a wasteful number, since it uses less digits than its factorization.

1087666815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262058.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1087666815 is about 32979.7940412004. The cubic root of 1087666815 is about 1028.4076362726.

The spelling of 1087666815 in words is "one billion, eighty-seven million, six hundred sixty-six thousand, eight hundred fifteen".