1587143087666 has 32 divisors (see below), whose sum is σ = 2531358883440. Its totient is φ = 746335795200.

The previous prime is 1587143087633. The next prime is 1587143087707. The reversal of 1587143087666 is 6667803417851.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 296067662641 + 1291075425025 = 544121^2 + 1136255^2 .

It is a super-2 number, since 2×1587143087666² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1587143087599 and 1587143087608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13313846 + ... + 13432526.

Almost surely, 2^{1587143087666} is an apocalyptic number.

1587143087666 is a deficient number, since it is larger than the sum of its proper divisors (944215795774).

1587143087666 is a wasteful number, since it uses less digits than its factorization.

1587143087666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120095 (or 120061 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 1587143087666 in words is "one trillion, five hundred eighty-seven billion, one hundred forty-three million, eighty-seven thousand, six hundred sixty-six".