3666400403 has 2 divisors, whose sum is σ = 3666400404. Its totient is φ = 3666400402.

The previous prime is 3666400391. The next prime is 3666400427. The reversal of 3666400403 is 3040046663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3666400403 - 2¹⁴ = 3666384019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3666400403.

It is not a weakly prime, because it can be changed into another prime (3666400103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833200201 + 1833200202.

It is an arithmetic number, because the mean of its divisors is an integer number (1833200202).

Almost surely, 2^3666400403 is an apocalyptic number.

3666400403 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666400403 is an equidigital number, since it uses as much as digits as its factorization.

3666400403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 3666400403 is about 60550.8084421670. The cubic root of 3666400403 is about 1541.9843429746.

The spelling of 3666400403 in words is "three billion, six hundred sixty-six million, four hundred thousand, four hundred three".