6466911623 has 4 divisors (see below), whose sum is σ = 6563432760. Its totient is φ = 6370390488.

The previous prime is 6466911617. The next prime is 6466911629. The reversal of 6466911623 is 3261196646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3261196646 = 2 ⋅1630598323.

It is an interprime number because it is at equal distance from previous prime (6466911617) and next prime (6466911629).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6466911623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466911629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48260468 + ... + 48260601.

It is an arithmetic number, because the mean of its divisors is an integer number (1640858190).

Almost surely, 2^6466911623 is an apocalyptic number.

6466911623 is a deficient number, since it is larger than the sum of its proper divisors (96521137).

6466911623 is an equidigital number, since it uses as much as digits as its factorization.

6466911623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96521136.

The product of its digits is 279936, while the sum is 44.

The square root of 6466911623 is about 80417.1102626798. The cubic root of 6466911623 is about 1863.0834528866.

The spelling of 6466911623 in words is "six billion, four hundred sixty-six million, nine hundred eleven thousand, six hundred twenty-three".