2666771217 has 24 divisors (see below), whose sum is σ = 4213048320. Its totient is φ = 1612046880.

The previous prime is 2666771153. The next prime is 2666771227. The reversal of 2666771217 is 7121776662.

It is not a de Polignac number, because 2666771217 - 2⁶ = 2666771153 is a prime.

It is a super-2 number, since 2×2666771217² = 14223337447639322178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666771227) 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, 3888 + ... + 73134.

It is an arithmetic number, because the mean of its divisors is an integer number (175543680).

Almost surely, 2^2666771217 is an apocalyptic number.

It is an amenable number.

2666771217 is a deficient number, since it is larger than the sum of its proper divisors (1546277103).

2666771217 is a wasteful number, since it uses less digits than its factorization.

2666771217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69653 (or 69650 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 2666771217 is about 51640.7902437598. The cubic root of 2666771217 is about 1386.7406712525.

The spelling of 2666771217 in words is "two billion, six hundred sixty-six million, seven hundred seventy-one thousand, two hundred seventeen".