2661117576 has 64 divisors (see below), whose sum is σ = 7586006400. Its totient is φ = 770638848.

The previous prime is 2661117553. The next prime is 2661117583. The reversal of 2661117576 is 6757111662.

It is a super-2 number, since 2×2661117576² = 14163093506592231552, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 245556 + ... + 256163.

It is an arithmetic number, because the mean of its divisors is an integer number (118531350).

Almost surely, 2^2661117576 is an apocalyptic number.

2661117576 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2661117576 is an abundant number, since it is smaller than the sum of its proper divisors (4924888824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661117576 is a wasteful number, since it uses less digits than its factorization.

2661117576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501758 (or 501754 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 2661117576 is about 51586.0211297596. The cubic root of 2661117576 is about 1385.7599995891.

The spelling of 2661117576 in words is "two billion, six hundred sixty-one million, one hundred seventeen thousand, five hundred seventy-six".