2661340166625 has 48 divisors (see below), whose sum is σ = 5151485589120. Its totient is φ = 1216612639200.

The previous prime is 2661340166587. The next prime is 2661340166629. The reversal of 2661340166625 is 5266610431662.

2661340166625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2661340166625 - 2¹¹ = 2661340164577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661340166629) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72399045 + ... + 72435794.

It is an arithmetic number, because the mean of its divisors is an integer number (107322616440).

Almost surely, 2^{2661340166625} is an apocalyptic number.

2661340166625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2661340166625 is a deficient number, since it is larger than the sum of its proper divisors (2490145422495).

2661340166625 is a wasteful number, since it uses less digits than its factorization.

2661340166625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144834871 (or 144834854 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 2661340166625 in words is "two trillion, six hundred sixty-one billion, three hundred forty million, one hundred sixty-six thousand, six hundred twenty-five".