3666398459 has 2 divisors, whose sum is σ = 3666398460. Its totient is φ = 3666398458.

The previous prime is 3666398443. The next prime is 3666398507. The reversal of 3666398459 is 9548936663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3666398459 - 2⁴ = 3666398443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3666398398 and 3666398407.

It is not a weakly prime, because it can be changed into another prime (3666398159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833199229 + 1833199230.

It is an arithmetic number, because the mean of its divisors is an integer number (1833199230).

Almost surely, 2^3666398459 is an apocalyptic number.

3666398459 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666398459 is an equidigital number, since it uses as much as digits as its factorization.

3666398459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 59.

The square root of 3666398459 is about 60550.7923895303. The cubic root of 3666398459 is about 1541.9840704441.

The spelling of 3666398459 in words is "three billion, six hundred sixty-six million, three hundred ninety-eight thousand, four hundred fifty-nine".