87630665 has 8 divisors (see below), whose sum is σ = 111342600. Its totient is φ = 65980672.

The previous prime is 87630661. The next prime is 87630691. The reversal of 87630665 is 56603678.

It can be written as a sum of positive squares in 4 ways, for example, as 39300361 + 48330304 = 6269^2 + 6952^2 .

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

It is not a de Polignac number, because 87630665 - 2² = 87630661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87630661) 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, 515390 + ... + 515559.

It is an arithmetic number, because the mean of its divisors is an integer number (13917825).

Almost surely, 2^87630665 is an apocalyptic number.

87630665 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87630665 is a deficient number, since it is larger than the sum of its proper divisors (23711935).

87630665 is a wasteful number, since it uses less digits than its factorization.

87630665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030971.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 87630665 is about 9361.1251994619. The cubic root of 87630665 is about 444.1728775833.

The spelling of 87630665 in words is "eighty-seven million, six hundred thirty thousand, six hundred sixty-five".