366415661 has 4 divisors (see below), whose sum is σ = 366574524. Its totient is φ = 366256800.

The previous prime is 366415649. The next prime is 366415669. The reversal of 366415661 is 166514663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166514663 = 7 ⋅23787809.

It can be written as a sum of positive squares in 2 ways, for example, as 207907561 + 158508100 = 14419^2 + 12590^2 .

It is a cyclic number.

It is not a de Polignac number, because 366415661 - 2⁶ = 366415597 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 (366415669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75920 + ... + 80601.

It is an arithmetic number, because the mean of its divisors is an integer number (91643631).

Almost surely, 2^366415661 is an apocalyptic number.

It is an amenable number.

366415661 is a deficient number, since it is larger than the sum of its proper divisors (158863).

366415661 is a wasteful number, since it uses less digits than its factorization.

366415661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158862.

The product of its digits is 77760, while the sum is 38.

The square root of 366415661 is about 19141.9868613475. The cubic root of 366415661 is about 715.5796958181.

The spelling of 366415661 in words is "three hundred sixty-six million, four hundred fifteen thousand, six hundred sixty-one".