1660417963 has 2 divisors, whose sum is σ = 1660417964. Its totient is φ = 1660417962.

The previous prime is 1660417951. The next prime is 1660417981. The reversal of 1660417963 is 3697140661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660417963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1660417933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830208981 + 830208982.

It is an arithmetic number, because the mean of its divisors is an integer number (830208982).

Almost surely, 2^1660417963 is an apocalyptic number.

1660417963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660417963 is an equidigital number, since it uses as much as digits as its factorization.

1660417963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 1660417963 is about 40748.2265012847. The cubic root of 1660417963 is about 1184.1475143675.

The spelling of 1660417963 in words is "one billion, six hundred sixty million, four hundred seventeen thousand, nine hundred sixty-three".