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66659977614 = 2371191156059
BaseRepresentation
bin111110000101001111…
…101000100110001110
320101001122111201111210
4332011033220212032
52043004423240424
650342334355250
74546616314026
oct760517504616
9211048451453
1066659977614
11262a790189a
1210b0435bb26
136394491549
1433251bca86
151b022a4729
hexf853e898e

66659977614 has 16 divisors (see below), whose sum is σ = 133322682240. Its totient is φ = 22219538040.

The previous prime is 66659977607. The next prime is 66659977627. The reversal of 66659977614 is 41677995666.

It is a happy number.

It is a super-2 number, since 2×666599776142 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349117 + ... + 505175.

It is an arithmetic number, because the mean of its divisors is an integer number (8332667640).

Almost surely, 266659977614 is an apocalyptic number.

66659977614 is an abundant number, since it is smaller than the sum of its proper divisors (66662704626).

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

66659977614 is a wasteful number, since it uses less digits than its factorization.

66659977614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227255.

The product of its digits is 102876480, while the sum is 66.

The spelling of 66659977614 in words is "sixty-six billion, six hundred fifty-nine million, nine hundred seventy-seven thousand, six hundred fourteen".

Divisors: 1 2 3 6 71191 142382 156059 213573 312118 427146 468177 936354 11109996269 22219992538 33329988807 66659977614