8553037661 has 6 divisors (see below), whose sum is σ = 9949452030. Its totient is φ = 7331175096.

The previous prime is 8553037573. The next prime is 8553037709. The reversal of 8553037661 is 1667303558.

It can be written as a sum of positive squares in only one way, i.e., 7785415225 + 767622436 = 88235^2 + 27706^2 .

It is not a de Polignac number, because 8553037661 - 2¹⁴ = 8553021277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8553037261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87275846 + ... + 87275943.

It is an arithmetic number, because the mean of its divisors is an integer number (1658242005).

Almost surely, 2^8553037661 is an apocalyptic number.

It is an amenable number.

8553037661 is a deficient number, since it is larger than the sum of its proper divisors (1396414369).

8553037661 is a wasteful number, since it uses less digits than its factorization.

8553037661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174551803 (or 174551796 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 8553037661 is about 92482.6343753248. The cubic root of 8553037661 is about 2045.0634868891.

The spelling of 8553037661 in words is "eight billion, five hundred fifty-three million, thirty-seven thousand, six hundred sixty-one".