6620121266 has 72 divisors (see below), whose sum is σ = 11720130240. Its totient is φ = 2801589120.

The previous prime is 6620121241. The next prime is 6620121301. The reversal of 6620121266 is 6621210266.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7203155 + ... + 7204073.

Almost surely, 2^6620121266 is an apocalyptic number.

6620121266 is a deficient number, since it is larger than the sum of its proper divisors (5100008974).

6620121266 is a wasteful number, since it uses less digits than its factorization.

6620121266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6620121266 is about 81364.1276362010. The cubic root of 6620121266 is about 1877.6817344855.

The spelling of 6620121266 in words is "six billion, six hundred twenty million, one hundred twenty-one thousand, two hundred sixty-six".