6664219020 has 36 divisors (see below), whose sum is σ = 20214798240. Its totient is φ = 1777125024.

The previous prime is 6664219013. The next prime is 6664219039. The reversal of 6664219020 is 209124666.

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

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

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, 18511540 + ... + 18511899.

Almost surely, 2^6664219020 is an apocalyptic number.

6664219020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6664219020 is an abundant number, since it is smaller than the sum of its proper divisors (13550579220).

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

6664219020 is a wasteful number, since it uses less digits than its factorization.

6664219020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37023454 (or 37023449 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6664219020 is about 81634.6680032448. The cubic root of 6664219020 is about 1881.8416971978.

The spelling of 6664219020 in words is "six billion, six hundred sixty-four million, two hundred nineteen thousand, twenty".