6671390885 has 8 divisors (see below), whose sum is σ = 8025635736. Its totient is φ = 5323801600.

The previous prime is 6671390863. The next prime is 6671390893. The reversal of 6671390885 is 5880931766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3972276676 + 2699114209 = 63026^2 + 51953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6671390885 - 2⁸ = 6671390629 is a prime.

It is a super-2 number, since 2×6671390885² = 89014912680922166450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1661684 + ... + 1665693.

It is an arithmetic number, because the mean of its divisors is an integer number (1003204467).

Almost surely, 2^6671390885 is an apocalyptic number.

It is an amenable number.

6671390885 is a deficient number, since it is larger than the sum of its proper divisors (1354244851).

6671390885 is a wasteful number, since it uses less digits than its factorization.

6671390885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327783.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 6671390885 is about 81678.5827803103. The cubic root of 6671390885 is about 1882.5165187580.

The spelling of 6671390885 in words is "six billion, six hundred seventy-one million, three hundred ninety thousand, eight hundred eighty-five".