6615974885 has 16 divisors (see below), whose sum is σ = 8844701040. Its totient is φ = 4717171200.

The previous prime is 6615974879. The next prime is 6615974891. The reversal of 6615974885 is 5884795166.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6615974879) and next prime (6615974891).

It can be written as a sum of positive squares in 8 ways, for example, as 2285413636 + 4330561249 = 47806^2 + 65807^2 .

It is not a de Polignac number, because 6615974885 - 2³⁰ = 5542233061 is a prime.

It is a super-2 number, since 2×6615974885² = 87542247357901526450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1753016 + ... + 1756785.

It is an arithmetic number, because the mean of its divisors is an integer number (552793815).

Almost surely, 2^6615974885 is an apocalyptic number.

6615974885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6615974885 is a deficient number, since it is larger than the sum of its proper divisors (2228726155).

6615974885 is a wasteful number, since it uses less digits than its factorization.

6615974885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509848.

The product of its digits is 14515200, while the sum is 59.

The square root of 6615974885 is about 81338.6432453849. The cubic root of 6615974885 is about 1877.2896364373.

The spelling of 6615974885 in words is "six billion, six hundred fifteen million, nine hundred seventy-four thousand, eight hundred eighty-five".