6601616031 has 4 divisors (see below), whose sum is σ = 8802154712. Its totient is φ = 4401077352.

The previous prime is 6601616027. The next prime is 6601616039. The reversal of 6601616031 is 1306161066.

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

It is not a de Polignac number, because 6601616031 - 2² = 6601616027 is a prime.

It is a super-2 number, since 2×6601616031² = 87162668441512385922, which contains 22 as substring.

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 6601616031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601616039) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1100269336 + ... + 1100269341.

It is an arithmetic number, because the mean of its divisors is an integer number (2200538678).

Almost surely, 2^6601616031 is an apocalyptic number.

6601616031 is a deficient number, since it is larger than the sum of its proper divisors (2200538681).

6601616031 is a wasteful number, since it uses less digits than its factorization.

6601616031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200538680.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 6601616031 is about 81250.3294208707. The cubic root of 6601616031 is about 1875.9305395660.

Adding to 6601616031 its reverse (1306161066), we get a palindrome (7907777097).

The spelling of 6601616031 in words is "six billion, six hundred one million, six hundred sixteen thousand, thirty-one".