2666665534 has 12 divisors (see below), whose sum is σ = 4331359656. Its totient is φ = 1230768552.

The previous prime is 2666665531. The next prime is 2666665541. The reversal of 2666665534 is 4355666662.

It is a super-2 number, since 2×2666665534² = 14222210140447010312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666665531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3944434 + ... + 3945109.

It is an arithmetic number, because the mean of its divisors is an integer number (360946638).

Almost surely, 2^2666665534 is an apocalyptic number.

2666665534 is a deficient number, since it is larger than the sum of its proper divisors (1664694122).

2666665534 is a wasteful number, since it uses less digits than its factorization.

2666665534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889571 (or 7889558 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 49.

The square root of 2666665534 is about 51639.7669824332. The cubic root of 2666665534 is about 1386.7223523644.

The spelling of 2666665534 in words is "two billion, six hundred sixty-six million, six hundred sixty-five thousand, five hundred thirty-four".