2666519138 has 16 divisors (see below), whose sum is σ = 4013399040. Its totient is φ = 1328727456.

The previous prime is 2666519137. The next prime is 2666519143. The reversal of 2666519138 is 8319156662.

It is a happy number.

It is a super-2 number, since 2×2666519138² = 14220648626640526088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2666519092 and 2666519101.

It is not an unprimeable number, because it can be changed into a prime (2666519137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189823 + ... + 1192061.

It is an arithmetic number, because the mean of its divisors is an integer number (250837440).

Almost surely, 2^2666519138 is an apocalyptic number.

2666519138 is a deficient number, since it is larger than the sum of its proper divisors (1346879902).

2666519138 is a wasteful number, since it uses less digits than its factorization.

2666519138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001.

The product of its digits is 466560, while the sum is 47.

The square root of 2666519138 is about 51638.3494895025. The cubic root of 2666519138 is about 1386.6969755636.

The spelling of 2666519138 in words is "two billion, six hundred sixty-six million, five hundred nineteen thousand, one hundred thirty-eight".