2040641661 has 8 divisors (see below), whose sum is σ = 2724901120. Its totient is φ = 1358404992.

The previous prime is 2040641657. The next prime is 2040641677. The reversal of 2040641661 is 1661460402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2040641661 - 2² = 2040641657 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 (2040641621) 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, 503341 + ... + 507378.

It is an arithmetic number, because the mean of its divisors is an integer number (340612640).

Almost surely, 2^2040641661 is an apocalyptic number.

It is an amenable number.

2040641661 is a deficient number, since it is larger than the sum of its proper divisors (684259459).

2040641661 is a wasteful number, since it uses less digits than its factorization.

2040641661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011395.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2040641661 is about 45173.4619107281. The cubic root of 2040641661 is about 1268.3981003858.

The spelling of 2040641661 in words is "two billion, forty million, six hundred forty-one thousand, six hundred sixty-one".