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66665343 = 322221781
BaseRepresentation
bin1111111001001…
…1101101111111
311122102221122210
43332103231333
5114031242333
610340511503
71436434413
oct376235577
9148387583
1066665343
11346a3728
121a3ab593
1310a71a64
148bd4d43
155cbca63
hex3f93b7f

66665343 has 4 divisors (see below), whose sum is σ = 88887128. Its totient is φ = 44443560.

The previous prime is 66665341. The next prime is 66665359. The reversal of 66665343 is 34356666.

It is a happy number.

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

It is not a de Polignac number, because 66665343 - 21 = 66665341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66665341) 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, 11110888 + ... + 11110893.

It is an arithmetic number, because the mean of its divisors is an integer number (22221782).

Almost surely, 266665343 is an apocalyptic number.

66665343 is a deficient number, since it is larger than the sum of its proper divisors (22221785).

66665343 is a wasteful number, since it uses less digits than its factorization.

66665343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22221784.

The product of its digits is 233280, while the sum is 39.

The square root of 66665343 is about 8164.8847511768. The cubic root of 66665343 is about 405.4774494178.

The spelling of 66665343 in words is "sixty-six million, six hundred sixty-five thousand, three hundred forty-three".

Divisors: 1 3 22221781 66665343