6616243405 has 8 divisors (see below), whose sum is σ = 7943611032. Its totient is φ = 5290248768.

The previous prime is 6616243373. The next prime is 6616243433. The reversal of 6616243405 is 5043426166.

It can be written as a sum of positive squares in 4 ways, for example, as 58644964 + 6557598441 = 7658^2 + 80979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6616243405 - 2⁵ = 6616243373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332614 + ... + 351943.

It is an arithmetic number, because the mean of its divisors is an integer number (992951379).

Almost surely, 2^6616243405 is an apocalyptic number.

It is an amenable number.

6616243405 is a deficient number, since it is larger than the sum of its proper divisors (1327367627).

6616243405 is a wasteful number, since it uses less digits than its factorization.

6616243405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686495.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6616243405 is about 81340.2938585791. The cubic root of 6616243405 is about 1877.3150337019.

The spelling of 6616243405 in words is "six billion, six hundred sixteen million, two hundred forty-three thousand, four hundred five".