3666398507 has 2 divisors, whose sum is σ = 3666398508. Its totient is φ = 3666398506.

The previous prime is 3666398459. The next prime is 3666398509. The reversal of 3666398507 is 7058936663.

3666398507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3666398507 - 2⁶ = 3666398443 is a prime.

Together with 3666398509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3666398509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833199253 + 1833199254.

It is an arithmetic number, because the mean of its divisors is an integer number (1833199254).

Almost surely, 2^3666398507 is an apocalyptic number.

3666398507 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666398507 is an equidigital number, since it uses as much as digits as its factorization.

3666398507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The square root of 3666398507 is about 60550.7927858917. The cubic root of 3666398507 is about 1541.9840771732.

The spelling of 3666398507 in words is "three billion, six hundred sixty-six million, three hundred ninety-eight thousand, five hundred seven".