36661217252399 has 8 divisors (see below), whose sum is σ = 37177677665280. Its totient is φ = 36144759763000.

The previous prime is 36661217252393. The next prime is 36661217252557. The reversal of 36661217252399 is 99325271216663.

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 36661217252399 - 2¹² = 36661217248303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36661217252393) 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, 41994062 + ... + 42858180.

It is an arithmetic number, because the mean of its divisors is an integer number (4647209708160).

Almost surely, 2^{36661217252399} is an apocalyptic number.

36661217252399 is a deficient number, since it is larger than the sum of its proper divisors (516460412881).

36661217252399 is an equidigital number, since it uses as much as digits as its factorization.

36661217252399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461741.

The product of its digits is 44089920, while the sum is 62.

The spelling of 36661217252399 in words is "thirty-six trillion, six hundred sixty-one billion, two hundred seventeen million, two hundred fifty-two thousand, three hundred ninety-nine".