366823561 has 8 divisors (see below), whose sum is σ = 401517704. Its totient is φ = 333054720.

The previous prime is 366823549. The next prime is 366823631. The reversal of 366823561 is 165328663.

It can be written as a sum of positive squares in 4 ways, for example, as 2013561 + 364810000 = 1419^2 + 19100^2 .

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 366823561 - 2⁵ = 366823529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (366823531) 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, 230496 + ... + 232081.

It is an arithmetic number, because the mean of its divisors is an integer number (50189713).

Almost surely, 2^366823561 is an apocalyptic number.

It is an amenable number.

366823561 is a deficient number, since it is larger than the sum of its proper divisors (34694143).

366823561 is a wasteful number, since it uses less digits than its factorization.

366823561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462651.

The product of its digits is 155520, while the sum is 40.

The square root of 366823561 is about 19152.6384866420. The cubic root of 366823561 is about 715.8451290820.

The spelling of 366823561 in words is "three hundred sixty-six million, eight hundred twenty-three thousand, five hundred sixty-one".