6649672965 has 32 divisors (see below), whose sum is σ = 11471556096. Its totient is φ = 3269783040.

The previous prime is 6649672963. The next prime is 6649672973. The reversal of 6649672965 is 5692769466.

It is not a de Polignac number, because 6649672965 - 2¹ = 6649672963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6649672899 and 6649672908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649672963) 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, 147220 + ... + 187010.

It is an arithmetic number, because the mean of its divisors is an integer number (358486128).

Almost surely, 2^6649672965 is an apocalyptic number.

6649672965 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6649672965 is a deficient number, since it is larger than the sum of its proper divisors (4821883131).

6649672965 is a wasteful number, since it uses less digits than its factorization.

6649672965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40669.

The product of its digits is 29393280, while the sum is 60.

The square root of 6649672965 is about 81545.5269466082. The cubic root of 6649672965 is about 1880.4715284916.

The spelling of 6649672965 in words is "six billion, six hundred forty-nine million, six hundred seventy-two thousand, nine hundred sixty-five".