1566974963 has 2 divisors, whose sum is σ = 1566974964. Its totient is φ = 1566974962.

The previous prime is 1566974921. The next prime is 1566974977. The reversal of 1566974963 is 3694796651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1566974963 - 2²⁸ = 1298539507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1566974899 and 1566974908.

It is not a weakly prime, because it can be changed into another prime (1566974993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783487481 + 783487482.

It is an arithmetic number, because the mean of its divisors is an integer number (783487482).

Almost surely, 2^1566974963 is an apocalyptic number.

1566974963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566974963 is an equidigital number, since it uses as much as digits as its factorization.

1566974963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The square root of 1566974963 is about 39585.0345837919. The cubic root of 1566974963 is about 1161.5039359031.

The spelling of 1566974963 in words is "one billion, five hundred sixty-six million, nine hundred seventy-four thousand, nine hundred sixty-three".