8661381299 has 4 divisors (see below), whose sum is σ = 8758700280. Its totient is φ = 8564062320.

The previous prime is 8661381263. The next prime is 8661381341. The reversal of 8661381299 is 9921831668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8661381299 - 2¹² = 8661377203 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 8661381299.

It is not an unprimeable number, because it can be changed into a prime (8661381259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48659357 + ... + 48659534.

It is an arithmetic number, because the mean of its divisors is an integer number (2189675070).

Almost surely, 2^8661381299 is an apocalyptic number.

8661381299 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8661381299 is a deficient number, since it is larger than the sum of its proper divisors (97318981).

8661381299 is an equidigital number, since it uses as much as digits as its factorization.

8661381299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97318980.

The product of its digits is 1119744, while the sum is 53.

The square root of 8661381299 is about 93066.5423178491. The cubic root of 8661381299 is about 2053.6624040195.

The spelling of 8661381299 in words is "eight billion, six hundred sixty-one million, three hundred eighty-one thousand, two hundred ninety-nine".