3669420561 has 4 divisors (see below), whose sum is σ = 4892560752. Its totient is φ = 2446280372.

The previous prime is 3669420541. The next prime is 3669420569. The reversal of 3669420561 is 1650249663.

3669420561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3669420561 - 2¹¹ = 3669418513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3669420569) 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, 611570091 + ... + 611570096.

It is an arithmetic number, because the mean of its divisors is an integer number (1223140188).

Almost surely, 2^3669420561 is an apocalyptic number.

It is an amenable number.

3669420561 is a deficient number, since it is larger than the sum of its proper divisors (1223140191).

3669420561 is a wasteful number, since it uses less digits than its factorization.

3669420561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223140190.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 3669420561 is about 60575.7423479069. The cubic root of 3669420561 is about 1542.4076244582.

The spelling of 3669420561 in words is "three billion, six hundred sixty-nine million, four hundred twenty thousand, five hundred sixty-one".