887766661 has 8 divisors (see below), whose sum is σ = 893851200. Its totient is φ = 881698752.

The previous prime is 887766643. The next prime is 887766679. The reversal of 887766661 is 166667788.

It is an interprime number because it is at equal distance from previous prime (887766643) and next prime (887766679).

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

It is a cyclic number.

It is not a de Polignac number, because 887766661 - 2⁹ = 887766149 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (887760661) 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, 114246 + ... + 121768.

It is an arithmetic number, because the mean of its divisors is an integer number (111731400).

Almost surely, 2^887766661 is an apocalyptic number.

It is an amenable number.

887766661 is a deficient number, since it is larger than the sum of its proper divisors (6084539).

887766661 is a wasteful number, since it uses less digits than its factorization.

887766661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315.

The product of its digits is 4064256, while the sum is 55.

The square root of 887766661 is about 29795.4134222031. The cubic root of 887766661 is about 961.0949099621.

The spelling of 887766661 in words is "eight hundred eighty-seven million, seven hundred sixty-six thousand, six hundred sixty-one".