2666618361 has 32 divisors (see below), whose sum is σ = 4327833600. Its totient is φ = 1609327440.

The previous prime is 2666618347. The next prime is 2666618363. The reversal of 2666618361 is 1638166662.

It is not a de Polignac number, because 2666618361 - 2¹⁰ = 2666617337 is a prime.

It is a super-2 number, since 2×2666618361² = 14221706966444652642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666618363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52200 + ... + 89766.

It is an arithmetic number, because the mean of its divisors is an integer number (135244800).

Almost surely, 2^2666618361 is an apocalyptic number.

It is an amenable number.

2666618361 is a deficient number, since it is larger than the sum of its proper divisors (1661215239).

2666618361 is a wasteful number, since it uses less digits than its factorization.

2666618361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37826 (or 37820 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 2666618361 is about 51639.3102297078. The cubic root of 2666618361 is about 1386.7141753311.

The spelling of 2666618361 in words is "two billion, six hundred sixty-six million, six hundred eighteen thousand, three hundred sixty-one".