6616652891 has 4 divisors (see below), whose sum is σ = 6964897800. Its totient is φ = 6268407984.

The previous prime is 6616652879. The next prime is 6616652897. The reversal of 6616652891 is 1982566166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6616652891 - 2¹⁸ = 6616390747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6616652897) 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, 174122426 + ... + 174122463.

It is an arithmetic number, because the mean of its divisors is an integer number (1741224450).

Almost surely, 2^6616652891 is an apocalyptic number.

6616652891 is a deficient number, since it is larger than the sum of its proper divisors (348244909).

6616652891 is a wasteful number, since it uses less digits than its factorization.

6616652891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348244908.

The product of its digits is 933120, while the sum is 50.

The square root of 6616652891 is about 81342.8109361854. The cubic root of 6616652891 is about 1877.3537625453.

The spelling of 6616652891 in words is "six billion, six hundred sixteen million, six hundred fifty-two thousand, eight hundred ninety-one".