6621001266 has 32 divisors (see below), whose sum is σ = 14911819776. Its totient is φ = 1941642000.

The previous prime is 6621001213. The next prime is 6621001291.

6621001266 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×6621001266³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615990 + ... + 1620081.

It is an arithmetic number, because the mean of its divisors is an integer number (465994368).

Almost surely, 2^6621001266 is an apocalyptic number.

6621001266 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6621001266 is an abundant number, since it is smaller than the sum of its proper divisors (8290818510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6621001266 is a wasteful number, since it uses less digits than its factorization.

6621001266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236118.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6621001266 is about 81369.5352450781. The cubic root of 6621001266 is about 1877.7649296744.

It can be divided in two parts, 662100 and 1266, that added together give a palindrome (663366).

The spelling of 6621001266 in words is "six billion, six hundred twenty-one million, one thousand, two hundred sixty-six".