6621465444 has 48 divisors (see below), whose sum is σ = 16893710400. Its totient is φ = 2001853440.

The previous prime is 6621465373. The next prime is 6621465493. The reversal of 6621465444 is 4445641266.

It is a super-2 number, since 2×6621465444² = 87687609252172234272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6621465396 and 6621465405.

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, 769 + ... + 115080.

It is an arithmetic number, because the mean of its divisors is an integer number (351952300).

Almost surely, 2^6621465444 is an apocalyptic number.

It is an amenable number.

6621465444 is an abundant number, since it is smaller than the sum of its proper divisors (10272244956).

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

6621465444 is a wasteful number, since it uses less digits than its factorization.

6621465444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116300 (or 116298 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The square root of 6621465444 is about 81372.3874788002. The cubic root of 6621465444 is about 1877.8088100869.

It can be divided in two parts, 662146 and 5444, that added together give a triangular number (667590 = T₁₁₅₅).

The spelling of 6621465444 in words is "six billion, six hundred twenty-one million, four hundred sixty-five thousand, four hundred forty-four".