8668142749 has 8 divisors (see below), whose sum is σ = 9917624448. Its totient is φ = 7421454960.

The previous prime is 8668142737. The next prime is 8668142759. The reversal of 8668142749 is 9472418668.

It is a happy number.

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 8668142749 - 2²⁷ = 8533925021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8668142749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8668142719) 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, 691822 + ... + 704239.

It is an arithmetic number, because the mean of its divisors is an integer number (1239703056).

Almost surely, 2^8668142749 is an apocalyptic number.

It is an amenable number.

8668142749 is a deficient number, since it is larger than the sum of its proper divisors (1249481699).

8668142749 is a wasteful number, since it uses less digits than its factorization.

8668142749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396955.

The product of its digits is 4644864, while the sum is 55.

The square root of 8668142749 is about 93102.8611214500. The cubic root of 8668142749 is about 2054.1966576787.

The spelling of 8668142749 in words is "eight billion, six hundred sixty-eight million, one hundred forty-two thousand, seven hundred forty-nine".