6610440064 has 16 divisors (see below), whose sum is σ = 13169236320. Its totient is φ = 3305219968.

The previous prime is 6610440049. The next prime is 6610440073. The reversal of 6610440064 is 4600440166.

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25821904 + ... + 25822159.

It is an arithmetic number, because the mean of its divisors is an integer number (823077270).

Almost surely, 2^6610440064 is an apocalyptic number.

6610440064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6610440064 is a deficient number, since it is larger than the sum of its proper divisors (6558796256).

6610440064 is an equidigital number, since it uses as much as digits as its factorization.

6610440064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51644077 (or 51644065 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6610440064 is about 81304.6128088684. The cubic root of 6610440064 is about 1876.7659866790.

The spelling of 6610440064 in words is "six billion, six hundred ten million, four hundred forty thousand, sixty-four".