6651887858 has 64 divisors (see below), whose sum is σ = 12720291840. Its totient is φ = 2533718400.

The previous prime is 6651887843. The next prime is 6651887867. The reversal of 6651887858 is 8587881566.

It is a super-2 number, since 2×6651887858² = 88495224150815656328, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6651887858.

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 31 ways as a sum of consecutive naturals, for example, 1733510 + ... + 1737342.

It is an arithmetic number, because the mean of its divisors is an integer number (198754560).

Almost surely, 2^6651887858 is an apocalyptic number.

6651887858 is a deficient number, since it is larger than the sum of its proper divisors (6068403982).

6651887858 is a wasteful number, since it uses less digits than its factorization.

6651887858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4103.

The product of its digits is 25804800, while the sum is 62.

The square root of 6651887858 is about 81559.1065301723. The cubic root of 6651887858 is about 1880.6802896792.

The spelling of 6651887858 in words is "six billion, six hundred fifty-one million, eight hundred eighty-seven thousand, eight hundred fifty-eight".