6685645902 has 16 divisors (see below), whose sum is σ = 14399852880. Its totient is φ = 2057121792.

The previous prime is 6685645867. The next prime is 6685645927. The reversal of 6685645902 is 2095465866.

It is a super-2 number, since 2×6685645902² = 89395722253858787208, which contains 22 as substring.

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, 42856627 + ... + 42856782.

It is an arithmetic number, because the mean of its divisors is an integer number (899990805).

Almost surely, 2^6685645902 is an apocalyptic number.

6685645902 is an abundant number, since it is smaller than the sum of its proper divisors (7714206978).

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

6685645902 is a wasteful number, since it uses less digits than its factorization.

6685645902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85713427.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The square root of 6685645902 is about 81765.7990971775. The cubic root of 6685645902 is about 1883.8563800031.

The spelling of 6685645902 in words is "six billion, six hundred eighty-five million, six hundred forty-five thousand, nine hundred two".