6616556023 has 16 divisors (see below), whose sum is σ = 8253066240. Its totient is φ = 5153349600.

The previous prime is 6616556017. The next prime is 6616556057. The reversal of 6616556023 is 3206556166.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-6616556023 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 (6616556923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155778 + ... + 193648.

It is an arithmetic number, because the mean of its divisors is an integer number (515816640).

Almost surely, 2^6616556023 is an apocalyptic number.

6616556023 is a deficient number, since it is larger than the sum of its proper divisors (1636510217).

6616556023 is a wasteful number, since it uses less digits than its factorization.

6616556023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40158.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 6616556023 is about 81342.2155033904. The cubic root of 6616556023 is about 1877.3446009952.

The spelling of 6616556023 in words is "six billion, six hundred sixteen million, five hundred fifty-six thousand, twenty-three".