6649667627 has 4 divisors (see below), whose sum is σ = 6649902960. Its totient is φ = 6649432296.

The previous prime is 6649667611. The next prime is 6649667653. The reversal of 6649667627 is 7267669466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7267669466 = 2 ⋅3633834733.

It is a cyclic number.

It is not a de Polignac number, because 6649667627 - 2⁴ = 6649667611 is a prime.

It is a super-2 number, since 2×6649667627² = 88436159099143622258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6649637627) 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, 68408 + ... + 134085.

It is an arithmetic number, because the mean of its divisors is an integer number (1662475740).

Almost surely, 2^6649667627 is an apocalyptic number.

6649667627 is a deficient number, since it is larger than the sum of its proper divisors (235333).

6649667627 is a wasteful number, since it uses less digits than its factorization.

6649667627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235332.

The product of its digits is 27433728, while the sum is 59.

The square root of 6649667627 is about 81545.4942164188. The cubic root of 6649667627 is about 1880.4710253110.

The spelling of 6649667627 in words is "six billion, six hundred forty-nine million, six hundred sixty-seven thousand, six hundred twenty-seven".