6688672650 has 72 divisors (see below), whose sum is σ = 19603905984. Its totient is φ = 1621495200.

The previous prime is 6688672649. The next prime is 6688672651. The reversal of 6688672650 is 562768866.

It is an interprime number because it is at equal distance from previous prime (6688672649) and next prime (6688672651).

It is not an unprimeable number, because it can be changed into a prime (6688672651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 670674 + ... + 680573.

It is an arithmetic number, because the mean of its divisors is an integer number (272276472).

Almost surely, 2^6688672650 is an apocalyptic number.

6688672650 is an abundant number, since it is smaller than the sum of its proper divisors (12915233334).

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

6688672650 is a wasteful number, since it uses less digits than its factorization.

6688672650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351276 (or 1351268 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The square root of 6688672650 is about 81784.3056460101. The cubic root of 6688672650 is about 1884.1406257020.

The spelling of 6688672650 in words is "six billion, six hundred eighty-eight million, six hundred seventy-two thousand, six hundred fifty".