6606401565 has 16 divisors (see below), whose sum is σ = 10743526656. Its totient is φ = 3465652800.

The previous prime is 6606401551. The next prime is 6606401567. The reversal of 6606401565 is 5651046066.

It is not a de Polignac number, because 6606401565 - 2⁷ = 6606401437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606401567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3609141 + ... + 3610970.

It is an arithmetic number, because the mean of its divisors is an integer number (671470416).

Almost surely, 2^6606401565 is an apocalyptic number.

It is an amenable number.

6606401565 is a deficient number, since it is larger than the sum of its proper divisors (4137125091).

6606401565 is a wasteful number, since it uses less digits than its factorization.

6606401565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7220180.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 6606401565 is about 81279.7734064263. The cubic root of 6606401565 is about 1876.3837195640.

The spelling of 6606401565 in words is "six billion, six hundred six million, four hundred one thousand, five hundred sixty-five".