7636666987 has 8 divisors (see below), whose sum is σ = 7712509616. Its totient is φ = 7561168992.

The previous prime is 7636666969. The next prime is 7636666997. The reversal of 7636666987 is 7896666367.

7636666987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7636666987 - 2¹⁹ = 7636142699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7636666907) 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, 41508 + ... + 130369.

It is an arithmetic number, because the mean of its divisors is an integer number (964063702).

Almost surely, 2^7636666987 is an apocalyptic number.

7636666987 is the 50454-th hex number.

7636666987 is a deficient number, since it is larger than the sum of its proper divisors (75842629).

7636666987 is a wasteful number, since it uses less digits than its factorization.

7636666987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172317.

The product of its digits is 82301184, while the sum is 64.

The square root of 7636666987 is about 87388.0254211068. The cubic root of 7636666987 is about 1969.2519501756.

The spelling of 7636666987 in words is "seven billion, six hundred thirty-six million, six hundred sixty-six thousand, nine hundred eighty-seven".