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99866641 = 719977741
BaseRepresentation
bin1011111001111…
…01100000010001
320221220202021111
411330331200101
5201031213031
613524253321
72321565250
oct574754021
9227822244
1099866641
1151410316
1229541241
13178c7bb4
14d398797
158b7a1b1
hex5f3d811

99866641 has 16 divisors (see below), whose sum is σ = 121394560. Its totient is φ = 80248320.

The previous prime is 99866609. The next prime is 99866651. The reversal of 99866641 is 14666899.

It is a 6-Lehmer number, since φ(99866641) divides (99866641-1)6.

It is a cyclic number.

It is not a de Polignac number, because 99866641 - 25 = 99866609 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99866651) 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, 9031 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (7587160).

Almost surely, 299866641 is an apocalyptic number.

It is an amenable number.

99866641 is a deficient number, since it is larger than the sum of its proper divisors (21527919).

99866641 is a wasteful number, since it uses less digits than its factorization.

99866641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864.

The product of its digits is 559872, while the sum is 49.

The square root of 99866641 is about 9993.3298254386. The cubic root of 99866641 is about 463.9524590238.

The spelling of 99866641 in words is "ninety-nine million, eight hundred sixty-six thousand, six hundred forty-one".

Divisors: 1 7 19 97 133 679 1843 7741 12901 54187 147079 750877 1029553 5256139 14266663 99866641