36664633725661 has 8 divisors (see below), whose sum is σ = 38861112192120. Its totient is φ = 34472570293248.

The previous prime is 36664633725659. The next prime is 36664633725689. The reversal of 36664633725661 is 16652733646663.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29199001032100 + 7465632693561 = 5403610^2 + 2732331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36664633725661 - 2¹ = 36664633725659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36664633725593 and 36664633725602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36664633725631) 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, 1103741406 + ... + 1103774623.

It is an arithmetic number, because the mean of its divisors is an integer number (4857639024015).

Almost surely, 2^{36664633725661} is an apocalyptic number.

It is an amenable number.

36664633725661 is a deficient number, since it is larger than the sum of its proper divisors (2196478466459).

36664633725661 is a wasteful number, since it uses less digits than its factorization.

36664633725661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207517023.

The product of its digits is 352719360, while the sum is 64.

The spelling of 36664633725661 in words is "thirty-six trillion, six hundred sixty-four billion, six hundred thirty-three million, seven hundred twenty-five thousand, six hundred sixty-one".