71660227 has 2 divisors, whose sum is σ = 71660228. Its totient is φ = 71660226.

The previous prime is 71660137. The next prime is 71660257. The reversal of 71660227 is 72206617.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71660227 is a prime.

It is not a weakly prime, because it can be changed into another prime (71660257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35830113 + 35830114.

It is an arithmetic number, because the mean of its divisors is an integer number (35830114).

Almost surely, 2^71660227 is an apocalyptic number.

71660227 is a deficient number, since it is larger than the sum of its proper divisors (1).

71660227 is an equidigital number, since it uses as much as digits as its factorization.

71660227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 71660227 is about 8465.2363818147. The cubic root of 71660227 is about 415.3613285097.

The spelling of 71660227 in words is "seventy-one million, six hundred sixty thousand, two hundred twenty-seven".