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80664635 = 531737129
BaseRepresentation
bin1001100111011…
…01100000111011
312121210012002002
410303231200323
5131122232020
612000531215
71666431602
oct463554073
9177705062
1080664635
1141595597
1223020b0b
1313933a6c
14a9daa39
157135975
hex4ced83b

80664635 has 16 divisors (see below), whose sum is σ = 101303040. Its totient is φ = 61585920.

The previous prime is 80664593. The next prime is 80664673. The reversal of 80664635 is 53646608.

It is not a de Polignac number, because 80664635 - 28 = 80664379 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7751 + ... + 14879.

It is an arithmetic number, because the mean of its divisors is an integer number (6331440).

Almost surely, 280664635 is an apocalyptic number.

80664635 is a deficient number, since it is larger than the sum of its proper divisors (20638405).

80664635 is a wasteful number, since it uses less digits than its factorization.

80664635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7238.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 80664635 is about 8981.3492861596. The cubic root of 80664635 is about 432.0769092465.

The spelling of 80664635 in words is "eighty million, six hundred sixty-four thousand, six hundred thirty-five".

Divisors: 1 5 31 73 155 365 2263 7129 11315 35645 220999 520417 1104995 2602085 16132927 80664635