665546023 has 2 divisors, whose sum is σ = 665546024. Its totient is φ = 665546022.

The previous prime is 665546017. The next prime is 665546029. The reversal of 665546023 is 320645566.

It is a balanced prime because it is at equal distance from previous prime (665546017) and next prime (665546029).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665546023 is a prime.

It is a super-2 number, since 2×665546023² = 885903017462233058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665546029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332773011 + 332773012.

It is an arithmetic number, because the mean of its divisors is an integer number (332773012).

Almost surely, 2^665546023 is an apocalyptic number.

665546023 is a deficient number, since it is larger than the sum of its proper divisors (1).

665546023 is an equidigital number, since it uses as much as digits as its factorization.

665546023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 665546023 is about 25798.1786760228. The cubic root of 665546023 is about 873.0907040025.

The spelling of 665546023 in words is "six hundred sixty-five million, five hundred forty-six thousand, twenty-three".