2661201107025 has 24 divisors (see below), whose sum is σ = 4400365233600. Its totient is φ = 1419141858240.

The previous prime is 2661201107009. The next prime is 2661201107027. The reversal of 2661201107025 is 5207011021662.

It is not a de Polignac number, because 2661201107025 - 2⁴ = 2661201107009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661201107027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1418262 + ... + 2708111.

It is an arithmetic number, because the mean of its divisors is an integer number (183348551400).

Almost surely, 2^{2661201107025} is an apocalyptic number.

2661201107025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2661201107025 is a deficient number, since it is larger than the sum of its proper divisors (1739164126575).

2661201107025 is a wasteful number, since it uses less digits than its factorization.

2661201107025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134985 (or 4134980 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

Adding to 2661201107025 its reverse (5207011021662), we get a palindrome (7868212128687).

The spelling of 2661201107025 in words is "two trillion, six hundred sixty-one billion, two hundred one million, one hundred seven thousand, twenty-five".