987766 has 8 divisors (see below), whose sum is σ = 1595664. Its totient is φ = 455880.

The previous prime is 987739. The next prime is 987793. The reversal of 987766 is 667789.

It is an interprime number because it is at equal distance from previous prime (987739) and next prime (987793).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18970 + ... + 19021.

It is an arithmetic number, because the mean of its divisors is an integer number (199458).

2⁹⁸⁷⁷⁶⁶ is an apocalyptic number.

987766 is a deficient number, since it is larger than the sum of its proper divisors (607898).

987766 is a wasteful number, since it uses less digits than its factorization.

987766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38006.

The product of its digits is 127008, while the sum is 43.

The square root of 987766 is about 993.8641758309. The cubic root of 987766 is about 99.5905255957.

The spelling of 987766 in words is "nine hundred eighty-seven thousand, seven hundred sixty-six".