2620680646 has 8 divisors (see below), whose sum is σ = 3952982520. Its totient is φ = 1303019808.

The previous prime is 2620680641. The next prime is 2620680653. The reversal of 2620680646 is 6460860262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2620680599 and 2620680608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620680641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3659811 + ... + 3660526.

It is an arithmetic number, because the mean of its divisors is an integer number (494122815).

Almost surely, 2^2620680646 is an apocalyptic number.

2620680646 is a deficient number, since it is larger than the sum of its proper divisors (1332301874).

2620680646 is a wasteful number, since it uses less digits than its factorization.

2620680646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320518.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 2620680646 is about 51192.5838964981. The cubic root of 2620680646 is about 1378.7050524839.

The spelling of 2620680646 in words is "two billion, six hundred twenty million, six hundred eighty thousand, six hundred forty-six".