665674147 has 2 divisors, whose sum is σ = 665674148. Its totient is φ = 665674146.

The previous prime is 665674123. The next prime is 665674153. The reversal of 665674147 is 741476566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665674147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665674097 and 665674106.

It is not a weakly prime, because it can be changed into another prime (665674157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332837073 + 332837074.

It is an arithmetic number, because the mean of its divisors is an integer number (332837074).

Almost surely, 2^665674147 is an apocalyptic number.

665674147 is a deficient number, since it is larger than the sum of its proper divisors (1).

665674147 is an equidigital number, since it uses as much as digits as its factorization.

665674147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 46.

The square root of 665674147 is about 25800.6617550791. The cubic root of 665674147 is about 873.1467265223.

The spelling of 665674147 in words is "six hundred sixty-five million, six hundred seventy-four thousand, one hundred forty-seven".