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66887286 = 2332213461
BaseRepresentation
bin1111111100100…
…1111001110110
311122212020002220
43333021321312
5114110343121
610345343210
71441350444
oct377117166
9148766086
1066887286
1134835454
121a497b06
1310b1ba9b
148c51b94
155d136c6
hex3fc9e76

66887286 has 16 divisors (see below), whose sum is σ = 133854768. Its totient is φ = 22282400.

The previous prime is 66887281. The next prime is 66887287. The reversal of 66887286 is 68278866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66887281) 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, 17596 + ... + 21056.

It is an arithmetic number, because the mean of its divisors is an integer number (8365923).

Almost surely, 266887286 is an apocalyptic number.

66887286 is an abundant number, since it is smaller than the sum of its proper divisors (66967482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66887286 is a wasteful number, since it uses less digits than its factorization.

66887286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6687.

The product of its digits is 1548288, while the sum is 51.

The square root of 66887286 is about 8178.4647703588. The cubic root of 66887286 is about 405.9269243292.

The spelling of 66887286 in words is "sixty-six million, eight hundred eighty-seven thousand, two hundred eighty-six".

Divisors: 1 2 3 6 3221 3461 6442 6922 9663 10383 19326 20766 11147881 22295762 33443643 66887286