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68117667 = 3531912243
BaseRepresentation
bin1000000111101…
…10010010100011
311202011201212120
410003312102203
5114414231132
610431555323
71454663532
oct403662243
9152151776
1068117667
11354a58a2
121a98bb43
131115cb17
149092319
155ea802c
hex40f64a3

68117667 has 16 divisors (see below), whose sum is σ = 93063168. Its totient is φ = 44301920.

The previous prime is 68117611. The next prime is 68117669. The reversal of 68117667 is 76671186.

It is a cyclic number.

It is not a de Polignac number, because 68117667 - 28 = 68117411 is a prime.

It is a super-3 number, since 3×681176673 (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68117669) 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, 29248 + ... + 31490.

It is an arithmetic number, because the mean of its divisors is an integer number (5816448).

Almost surely, 268117667 is an apocalyptic number.

68117667 is a deficient number, since it is larger than the sum of its proper divisors (24945501).

68117667 is a wasteful number, since it uses less digits than its factorization.

68117667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490.

The product of its digits is 84672, while the sum is 42.

The square root of 68117667 is about 8253.3427773236. The cubic root of 68117667 is about 408.4008039928.

The spelling of 68117667 in words is "sixty-eight million, one hundred seventeen thousand, six hundred sixty-seven".

Divisors: 1 3 53 159 191 573 2243 6729 10123 30369 118879 356637 428413 1285239 22705889 68117667