2520045661 has 16 divisors (see below), whose sum is σ = 2901382528. Its totient is φ = 2144102400.

The previous prime is 2520045653. The next prime is 2520045673. The reversal of 2520045661 is 1665400252.

2520045661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2520045661 - 2³ = 2520045653 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 (2520045631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556141 + ... + 560653.

It is an arithmetic number, because the mean of its divisors is an integer number (181336408).

Almost surely, 2^2520045661 is an apocalyptic number.

It is an amenable number.

2520045661 is a deficient number, since it is larger than the sum of its proper divisors (381336867).

2520045661 is a wasteful number, since it uses less digits than its factorization.

2520045661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2520045661 is about 50200.0563844305. The cubic root of 2520045661 is about 1360.8266422323.

The spelling of 2520045661 in words is "two billion, five hundred twenty million, forty-five thousand, six hundred sixty-one".