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664784719 = 2922923611
BaseRepresentation
bin100111100111111…
…100111101001111
31201022220120012021
4213213330331033
52330141102334
6145544351011
722321401604
oct4747747517
91638816167
10664784719
11311287665
12166775467
13a795c651
146440c6ab
153d5683b4
hex279fcf4f

664784719 has 4 divisors (see below), whose sum is σ = 687708360. Its totient is φ = 641861080.

The previous prime is 664784713. The next prime is 664784737. The reversal of 664784719 is 917487466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664784719 - 213 = 664776527 is a prime.

It is a super-2 number, since 2×6647847192 = 883877445231817922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664784713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11461777 + ... + 11461834.

It is an arithmetic number, because the mean of its divisors is an integer number (171927090).

Almost surely, 2664784719 is an apocalyptic number.

664784719 is a deficient number, since it is larger than the sum of its proper divisors (22923641).

664784719 is a wasteful number, since it uses less digits than its factorization.

664784719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22923640.

The product of its digits is 2032128, while the sum is 52.

The square root of 664784719 is about 25783.4194590244. The cubic root of 664784719 is about 872.7576736664.

The spelling of 664784719 in words is "six hundred sixty-four million, seven hundred eighty-four thousand, seven hundred nineteen".

Divisors: 1 29 22923611 664784719