6404066280 has 128 divisors (see below), whose sum is σ = 22470480000. Its totient is φ = 1617864192.

The previous prime is 6404066269. The next prime is 6404066399. The reversal of 6404066280 is 826604046.

It is a happy number.

6404066280 is a `hidden beast` number, since 640 + 4 + 0 + 6 + 6 + 2 + 8 + 0 = 666.

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 31 ways as a sum of consecutive naturals, for example, 135525 + ... + 176564.

It is an arithmetic number, because the mean of its divisors is an integer number (175550625).

Almost surely, 2^6404066280 is an apocalyptic number.

6404066280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6404066280 is an abundant number, since it is smaller than the sum of its proper divisors (16066413720).

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

6404066280 is a wasteful number, since it uses less digits than its factorization.

6404066280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312128 (or 312118 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 6404066280 is about 80025.4102145062. The cubic root of 6404066280 is about 1857.0286585288.

The spelling of 6404066280 in words is "six billion, four hundred four million, sixty-six thousand, two hundred eighty".