6641587087 has 4 divisors (see below), whose sum is σ = 6645071736. Its totient is φ = 6638102440.

The previous prime is 6641587003. The next prime is 6641587093. The reversal of 6641587087 is 7807851466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6641587087 is a prime.

It is a super-2 number, since 2×6641587087² = 88221358068410291138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641587487) 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, 1739464 + ... + 1743277.

It is an arithmetic number, because the mean of its divisors is an integer number (1661267934).

Almost surely, 2^6641587087 is an apocalyptic number.

6641587087 is a deficient number, since it is larger than the sum of its proper divisors (3484649).

6641587087 is a wasteful number, since it uses less digits than its factorization.

6641587087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484648.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 6641587087 is about 81495.9329476017. The cubic root of 6641587087 is about 1879.7090132665.

The spelling of 6641587087 in words is "six billion, six hundred forty-one million, five hundred eighty-seven thousand, eighty-seven".