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665245671 = 3710331219
BaseRepresentation
bin100111101001101…
…101011111100111
31201100202222111120
4213221231133213
52330300330141
6150002305023
722325331516
oct4751553747
91640688446
10665245671
11311571a12
12166958173
13a7a913bc
14644cc67d
153d609c66
hex27a6d7e7

665245671 has 8 divisors (see below), whose sum is σ = 887147520. Its totient is φ = 443420472.

The previous prime is 665245663. The next prime is 665245741. The reversal of 665245671 is 176542566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665245671 - 23 = 665245663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665245621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5700 + ... + 36918.

It is an arithmetic number, because the mean of its divisors is an integer number (110893440).

Almost surely, 2665245671 is an apocalyptic number.

665245671 is a deficient number, since it is larger than the sum of its proper divisors (221901849).

665245671 is a wasteful number, since it uses less digits than its factorization.

665245671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38325.

The product of its digits is 302400, while the sum is 42.

The square root of 665245671 is about 25792.3568329845. The cubic root of 665245671 is about 872.9593461962.

The spelling of 665245671 in words is "six hundred sixty-five million, two hundred forty-five thousand, six hundred seventy-one".

Divisors: 1 3 7103 21309 31219 93657 221748557 665245671