336561661 has 4 divisors (see below), whose sum is σ = 344770524. Its totient is φ = 328352800.

The previous prime is 336561653. The next prime is 336561671. The reversal of 336561661 is 166165633.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26977636 + 309584025 = 5194^2 + 17595^2 .

It is a cyclic number.

It is not a de Polignac number, because 336561661 - 2³ = 336561653 is a prime.

It is a super-2 number, since 2×336561661² = 226547503310157842, which contains 22 as substring.

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 336561661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (336561671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4104370 + ... + 4104451.

It is an arithmetic number, because the mean of its divisors is an integer number (86192631).

Almost surely, 2^336561661 is an apocalyptic number.

It is an amenable number.

336561661 is a deficient number, since it is larger than the sum of its proper divisors (8208863).

336561661 is an equidigital number, since it uses as much as digits as its factorization.

336561661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208862.

The product of its digits is 58320, while the sum is 37.

The square root of 336561661 is about 18345.6169424743. The cubic root of 336561661 is about 695.5924840875.

The spelling of 336561661 in words is "three hundred thirty-six million, five hundred sixty-one thousand, six hundred sixty-one".