6649766662 has 64 divisors (see below), whose sum is σ = 13013618688. Its totient is φ = 2472768000.

The previous prime is 6649766653. The next prime is 6649766663. The reversal of 6649766662 is 2666679466.

It is a junction number, because it is equal to n+sod(n) for n = 6649766597 and 6649766606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649766663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338962 + ... + 358042.

It is an arithmetic number, because the mean of its divisors is an integer number (203337792).

Almost surely, 2^6649766662 is an apocalyptic number.

6649766662 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6649766662 is a deficient number, since it is larger than the sum of its proper divisors (6363852026).

6649766662 is a wasteful number, since it uses less digits than its factorization.

6649766662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19205.

The product of its digits is 23514624, while the sum is 58.

The square root of 6649766662 is about 81546.1014518781. The cubic root of 6649766662 is about 1880.4803606911.

The spelling of 6649766662 in words is "six billion, six hundred forty-nine million, seven hundred sixty-six thousand, six hundred sixty-two".