1660960403 has 2 divisors, whose sum is σ = 1660960404. Its totient is φ = 1660960402.

The previous prime is 1660960381. The next prime is 1660960409. The reversal of 1660960403 is 3040690661.

It is a strong prime.

It is an emirp because it is prime and its reverse (3040690661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660960403 - 2⁶ = 1660960339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1660960409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830480201 + 830480202.

It is an arithmetic number, because the mean of its divisors is an integer number (830480202).

Almost surely, 2^1660960403 is an apocalyptic number.

1660960403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660960403 is an equidigital number, since it uses as much as digits as its factorization.

1660960403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1660960403 is about 40754.8819529636. The cubic root of 1660960403 is about 1184.2764495829.

The spelling of 1660960403 in words is "one billion, six hundred sixty million, nine hundred sixty thousand, four hundred three".