6406644060 has 36 divisors (see below), whose sum is σ = 19433487528. Its totient is φ = 1708438368.

The previous prime is 6406644007. The next prime is 6406644077. The reversal of 6406644060 is 604466046.

It is a happy number.

6406644060 is a `hidden beast` number, since 6 + 4 + 0 + 6 + 644 + 0 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6406644060² = 82090176223066567200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17796054 + ... + 17796413.

It is an arithmetic number, because the mean of its divisors is an integer number (539819098).

Almost surely, 2^6406644060 is an apocalyptic number.

6406644060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6406644060 is an abundant number, since it is smaller than the sum of its proper divisors (13026843468).

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

6406644060 is a wasteful number, since it uses less digits than its factorization.

6406644060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35592482 (or 35592477 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 6406644060 is about 80041.5146033607. The cubic root of 6406644060 is about 1857.2777903031.

The spelling of 6406644060 in words is "six billion, four hundred six million, six hundred forty-four thousand, sixty".