87275661 has 16 divisors (see below), whose sum is σ = 128688960. Its totient is φ = 52168320.

The previous prime is 87275647. The next prime is 87275693. The reversal of 87275661 is 16657278.

It is not a de Polignac number, because 87275661 - 2⁶ = 87275597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87275611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15706 + ... + 20523.

It is an arithmetic number, because the mean of its divisors is an integer number (8043060).

Almost surely, 2^87275661 is an apocalyptic number.

It is an amenable number.

87275661 is a deficient number, since it is larger than the sum of its proper divisors (41413299).

87275661 is a wasteful number, since it uses less digits than its factorization.

87275661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36316.

The product of its digits is 141120, while the sum is 42.

The square root of 87275661 is about 9342.1443469901. The cubic root of 87275661 is about 443.5722637804.

The spelling of 87275661 in words is "eighty-seven million, two hundred seventy-five thousand, six hundred sixty-one".