6620640422 has 16 divisors (see below), whose sum is σ = 10894305600. Its totient is φ = 2992568040.

The previous prime is 6620640409. The next prime is 6620640461. The reversal of 6620640422 is 2240460266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836672 + ... + 844547.

It is an arithmetic number, because the mean of its divisors is an integer number (680894100).

Almost surely, 2^6620640422 is an apocalyptic number.

6620640422 is a deficient number, since it is larger than the sum of its proper divisors (4273665178).

6620640422 is a wasteful number, since it uses less digits than its factorization.

6620640422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681411.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 6620640422 is about 81367.3178985273. The cubic root of 6620640422 is about 1877.7308163789.

The spelling of 6620640422 in words is "six billion, six hundred twenty million, six hundred forty thousand, four hundred twenty-two".