2554620661 has 16 divisors (see below), whose sum is σ = 2759097600. Its totient is φ = 2357337600.

The previous prime is 2554620641. The next prime is 2554620671. The reversal of 2554620661 is 1660264552.

It is not a de Polignac number, because 2554620661 - 2¹⁹ = 2554096373 is a prime.

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 2554620661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2554620641) 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, 557821 + ... + 562381.

It is an arithmetic number, because the mean of its divisors is an integer number (172443600).

Almost surely, 2^2554620661 is an apocalyptic number.

It is an amenable number.

2554620661 is a deficient number, since it is larger than the sum of its proper divisors (204476939).

2554620661 is a wasteful number, since it uses less digits than its factorization.

2554620661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2554620661 is about 50543.2553462873. The cubic root of 2554620661 is about 1367.0219041321.

The spelling of 2554620661 in words is "two billion, five hundred fifty-four million, six hundred twenty thousand, six hundred sixty-one".