6658881642 has 32 divisors (see below), whose sum is σ = 16911446400. Its totient is φ = 1902537504.

The previous prime is 6658881583. The next prime is 6658881689. The reversal of 6658881642 is 2461888566.

6658881642 is a `hidden beast` number, since 6 + 6 + 588 + 8 + 16 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 8807667 + ... + 8808422.

It is an arithmetic number, because the mean of its divisors is an integer number (528482700).

Almost surely, 2^6658881642 is an apocalyptic number.

6658881642 is an abundant number, since it is smaller than the sum of its proper divisors (10252564758).

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

6658881642 is a wasteful number, since it uses less digits than its factorization.

6658881642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17616107 (or 17616101 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 54.

The square root of 6658881642 is about 81601.9708217884. The cubic root of 6658881642 is about 1881.3391735422.

The spelling of 6658881642 in words is "six billion, six hundred fifty-eight million, eight hundred eighty-one thousand, six hundred forty-two".