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80663761 = 296734133
BaseRepresentation
bin1001100111011…
…01010011010001
312121210010212201
410303231103101
5131122220021
612000523201
71666426213
oct463552321
9177703781
1080663761
1141594972
1223020501
1313933549
14a9da5b3
157135591
hex4ced4d1

80663761 has 8 divisors (see below), whose sum is σ = 83589480. Its totient is φ = 77747712.

The previous prime is 80663753. The next prime is 80663789. The reversal of 80663761 is 16736608.

It can be written as a sum of positive squares in 4 ways, for example, as 14745600 + 65918161 = 3840^2 + 8119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80663761 - 23 = 80663753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80663761.

It is not an unprimeable number, because it can be changed into a prime (80663701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17451 + ... + 21583.

It is an arithmetic number, because the mean of its divisors is an integer number (10448685).

Almost surely, 280663761 is an apocalyptic number.

It is an amenable number.

80663761 is a deficient number, since it is larger than the sum of its proper divisors (2925719).

80663761 is a wasteful number, since it uses less digits than its factorization.

80663761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 80663761 is about 8981.3006296416. The cubic root of 80663761 is about 432.0753487255.

The spelling of 80663761 in words is "eighty million, six hundred sixty-three thousand, seven hundred sixty-one".

Divisors: 1 29 673 4133 19517 119857 2781509 80663761