361666523 has 2 divisors, whose sum is σ = 361666524. Its totient is φ = 361666522.

The previous prime is 361666493. The next prime is 361666567. The reversal of 361666523 is 325666163.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 361666523 - 2¹⁴ = 361650139 is a prime.

It is not a weakly prime, because it can be changed into another prime (361666423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180833261 + 180833262.

It is an arithmetic number, because the mean of its divisors is an integer number (180833262).

Almost surely, 2^361666523 is an apocalyptic number.

361666523 is a deficient number, since it is larger than the sum of its proper divisors (1).

361666523 is an equidigital number, since it uses as much as digits as its factorization.

361666523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 38.

The square root of 361666523 is about 19017.5319902452. The cubic root of 361666523 is about 712.4746833315.

The spelling of 361666523 in words is "three hundred sixty-one million, six hundred sixty-six thousand, five hundred twenty-three".