8651666749 has 4 divisors (see below), whose sum is σ = 9438181920. Its totient is φ = 7865151580.

The previous prime is 8651666743. The next prime is 8651666801. The reversal of 8651666749 is 9476661568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8651666749 - 2¹³ = 8651658557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8651666693 and 8651666702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8651666743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393257569 + ... + 393257590.

It is an arithmetic number, because the mean of its divisors is an integer number (2359545480).

Almost surely, 2^8651666749 is an apocalyptic number.

It is an amenable number.

8651666749 is a deficient number, since it is larger than the sum of its proper divisors (786515171).

8651666749 is a wasteful number, since it uses less digits than its factorization.

8651666749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786515170.

The product of its digits is 13063680, while the sum is 58.

The square root of 8651666749 is about 93014.3362552247. The cubic root of 8651666749 is about 2052.8943252409.

The spelling of 8651666749 in words is "eight billion, six hundred fifty-one million, six hundred sixty-six thousand, seven hundred forty-nine".