2667699647 has 4 divisors (see below), whose sum is σ = 2759689320. Its totient is φ = 2575709976.

The previous prime is 2667699611. The next prime is 2667699703. The reversal of 2667699647 is 7469967662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7469967662 = 2 ⋅3734983831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2667699647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2667699647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667699607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45994793 + ... + 45994850.

It is an arithmetic number, because the mean of its divisors is an integer number (689922330).

Almost surely, 2^2667699647 is an apocalyptic number.

2667699647 is a deficient number, since it is larger than the sum of its proper divisors (91989673).

2667699647 is an equidigital number, since it uses as much as digits as its factorization.

2667699647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91989672.

The product of its digits is 41150592, while the sum is 62.

The square root of 2667699647 is about 51649.7787700974. The cubic root of 2667699647 is about 1386.9015827260.

The spelling of 2667699647 in words is "two billion, six hundred sixty-seven million, six hundred ninety-nine thousand, six hundred forty-seven".