6685522500 has 120 divisors (see below), whose sum is σ = 19761849184. Its totient is φ = 1758240000.

The previous prime is 6685522483. The next prime is 6685522517. The reversal of 6685522500 is 52255866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6685522483) and next prime (6685522517).

It is a super-2 number, since 2×6685522500² = 89392422196012500000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 541395 + ... + 553605.

Almost surely, 2^6685522500 is an apocalyptic number.

6685522500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6685522500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9880924592).

6685522500 is an abundant number, since it is smaller than the sum of its proper divisors (13076326684).

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

6685522500 is a wasteful number, since it uses less digits than its factorization.

6685522500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311 (or 12294 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 6685522500 is about 81765.0444872379. The cubic root of 6685522500 is about 1883.8447893466.

The spelling of 6685522500 in words is "six billion, six hundred eighty-five million, five hundred twenty-two thousand, five hundred".