87870639952666 has 8 divisors (see below), whose sum is σ = 133966713370644. Its totient is φ = 43215068829120.

The previous prime is 87870639952663. The next prime is 87870639952699. The reversal of 87870639952666 is 66625993607878.

It can be written as a sum of positive squares in 2 ways, for example, as 86895414576441 + 975225376225 = 9321771^2 + 987535^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 87870639952666.

It is not an unprimeable number, because it can be changed into a prime (87870639952663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360125573455 + ... + 360125573698.

Almost surely, 2^{87870639952666} is an apocalyptic number.

87870639952666 is a deficient number, since it is larger than the sum of its proper divisors (46096073417978).

87870639952666 is a wasteful number, since it uses less digits than its factorization.

87870639952666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720251147216.

The product of its (nonzero) digits is 9876142080, while the sum is 82.

The spelling of 87870639952666 in words is "eighty-seven trillion, eight hundred seventy billion, six hundred thirty-nine million, nine hundred fifty-two thousand, six hundred sixty-six".