1671622663 has 2 divisors, whose sum is σ = 1671622664. Its totient is φ = 1671622662.

The previous prime is 1671622649. The next prime is 1671622691. The reversal of 1671622663 is 3662261761.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671622663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671622613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835811331 + 835811332.

It is an arithmetic number, because the mean of its divisors is an integer number (835811332).

Almost surely, 2^1671622663 is an apocalyptic number.

1671622663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671622663 is an equidigital number, since it uses as much as digits as its factorization.

1671622663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 1671622663 is about 40885.4823011787. The cubic root of 1671622663 is about 1186.8051352415.

The spelling of 1671622663 in words is "one billion, six hundred seventy-one million, six hundred twenty-two thousand, six hundred sixty-three".