2666807979 has 16 divisors (see below), whose sum is σ = 4047646464. Its totient is φ = 1545975200.

The previous prime is 2666807963. The next prime is 2666807981. The reversal of 2666807979 is 9797086662.

It is not a de Polignac number, because 2666807979 - 2⁴ = 2666807963 is a prime.

It is a super-3 number, since 3×2666807979³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2666807999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1756032 + ... + 1757549.

It is an arithmetic number, because the mean of its divisors is an integer number (252977904).

Almost surely, 2^2666807979 is an apocalyptic number.

2666807979 is a deficient number, since it is larger than the sum of its proper divisors (1380838485).

2666807979 is a wasteful number, since it uses less digits than its factorization.

2666807979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513618.

The product of its (nonzero) digits is 13716864, while the sum is 60.

The square root of 2666807979 is about 51641.1461820901. The cubic root of 2666807979 is about 1386.7470433935.

The spelling of 2666807979 in words is "two billion, six hundred sixty-six million, eight hundred seven thousand, nine hundred seventy-nine".