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66657066 = 2372516323
BaseRepresentation
bin1111111001000…
…1101100101010
311122102112022020
43332101230222
5114031011231
610340405310
71436401320
oct376215452
9148375266
1066657066
1134698493
121a3a6836
1310a6b068
148bd1d10
155cba396
hex3f91b2a

66657066 has 32 divisors (see below), whose sum is σ = 152990208. Its totient is φ = 18966000.

The previous prime is 66657053. The next prime is 66657067. The reversal of 66657066 is 66075666.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (66657067) 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, 7381 + ... + 13703.

It is an arithmetic number, because the mean of its divisors is an integer number (4780944).

Almost surely, 266657066 is an apocalyptic number.

66657066 is an abundant number, since it is smaller than the sum of its proper divisors (86333142).

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

66657066 is a wasteful number, since it uses less digits than its factorization.

66657066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 66657066 is about 8164.3778697461. The cubic root of 66657066 is about 405.4606677058.

It can be divided in two parts, 6665 and 7066, that added together give a palindrome (13731).

The spelling of 66657066 in words is "sixty-six million, six hundred fifty-seven thousand, sixty-six".

Divisors: 1 2 3 6 7 14 21 42 251 502 753 1506 1757 3514 5271 6323 10542 12646 18969 37938 44261 88522 132783 265566 1587073 3174146 4761219 9522438 11109511 22219022 33328533 66657066