8534396661 has 32 divisors (see below), whose sum is σ = 13786871040. Its totient is φ = 4584231936.

The previous prime is 8534396657. The next prime is 8534396683. The reversal of 8534396661 is 1666934358.

It is a happy number.

It is not a de Polignac number, because 8534396661 - 2² = 8534396657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8534396161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281535 + ... + 310371.

It is an arithmetic number, because the mean of its divisors is an integer number (430839720).

Almost surely, 2^8534396661 is an apocalyptic number.

It is an amenable number.

8534396661 is a deficient number, since it is larger than the sum of its proper divisors (5252474379).

8534396661 is a wasteful number, since it uses less digits than its factorization.

8534396661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29693.

The product of its digits is 2799360, while the sum is 51.

The square root of 8534396661 is about 92381.7983208814. The cubic root of 8534396661 is about 2043.5766951513.

The spelling of 8534396661 in words is "eight billion, five hundred thirty-four million, three hundred ninety-six thousand, six hundred sixty-one".