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660138476 = 22181191129
BaseRepresentation
bin100111010110001…
…110100111101100
31201000011111202012
4213112032213230
52322443412401
6145301020352
722234040654
oct4726164754
91630144665
10660138476
113096a3898
121650b46b8
13a69c38aa
146395d364
153ce4b8bb
hex2758e9ec

660138476 has 12 divisors (see below), whose sum is σ = 1155892920. Its totient is φ = 329883360.

The previous prime is 660138469. The next prime is 660138481. The reversal of 660138476 is 674831066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38321 + ... + 52808.

It is an arithmetic number, because the mean of its divisors is an integer number (96324410).

Almost surely, 2660138476 is an apocalyptic number.

It is an amenable number.

660138476 is a deficient number, since it is larger than the sum of its proper divisors (495754444).

660138476 is a wasteful number, since it uses less digits than its factorization.

660138476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92944 (or 92942 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 660138476 is about 25693.1601014745. The cubic root of 660138476 is about 870.7196564470.

The spelling of 660138476 in words is "six hundred sixty million, one hundred thirty-eight thousand, four hundred seventy-six".

Divisors: 1 2 4 1811 3622 7244 91129 182258 364516 165034619 330069238 660138476