3240651661 has 8 divisors (see below), whose sum is σ = 3610275480. Its totient is φ = 2888219712.

The previous prime is 3240651643. The next prime is 3240651671. The reversal of 3240651661 is 1661560423.

It can be written as a sum of positive squares in 4 ways, for example, as 15093225 + 3225558436 = 3885^2 + 56794^2 .

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 3240651661 - 2¹¹ = 3240649613 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 (3240651671) 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, 4297570 + ... + 4298323.

It is an arithmetic number, because the mean of its divisors is an integer number (451284435).

Almost surely, 2^3240651661 is an apocalyptic number.

It is an amenable number.

3240651661 is a deficient number, since it is larger than the sum of its proper divisors (369623819).

3240651661 is a wasteful number, since it uses less digits than its factorization.

3240651661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8595935.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 3240651661 is about 56926.7218536251. The cubic root of 3240651661 is about 1479.8264437644.

The spelling of 3240651661 in words is "three billion, two hundred forty million, six hundred fifty-one thousand, six hundred sixty-one".