6611863680 has 128 divisors (see below), whose sum is σ = 23417078400. Its totient is φ = 1763159040.

The previous prime is 6611863651. The next prime is 6611863721. The reversal of 6611863680 is 863681166.

6611863680 is a `hidden beast` number, since 6 + 6 + 1 + 1 + 8 + 636 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 174036 + ... + 208595.

It is an arithmetic number, because the mean of its divisors is an integer number (182945925).

Almost surely, 2^6611863680 is an apocalyptic number.

6611863680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6611863680 is an abundant number, since it is smaller than the sum of its proper divisors (16805214720).

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

6611863680 is a wasteful number, since it uses less digits than its factorization.

6611863680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382659 (or 382641 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 6611863680 is about 81313.3671667826. The cubic root of 6611863680 is about 1876.9007029906.

The spelling of 6611863680 in words is "six billion, six hundred eleven million, eight hundred sixty-three thousand, six hundred eighty".