1667673697 has 2 divisors, whose sum is σ = 1667673698. Its totient is φ = 1667673696.

The previous prime is 1667673671. The next prime is 1667673713. The reversal of 1667673697 is 7963767661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1467196416 + 200477281 = 38304^2 + 14159^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667673697 - 2²⁷ = 1533455969 is a prime.

It is a super-2 number, since 2×1667673697² = 5562271119331295618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1667673607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833836848 + 833836849.

It is an arithmetic number, because the mean of its divisors is an integer number (833836849).

Almost surely, 2^1667673697 is an apocalyptic number.

It is an amenable number.

1667673697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667673697 is an equidigital number, since it uses as much as digits as its factorization.

1667673697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12002256, while the sum is 58.

The square root of 1667673697 is about 40837.1607362706. The cubic root of 1667673697 is about 1185.8698467151.

The spelling of 1667673697 in words is "one billion, six hundred sixty-seven million, six hundred seventy-three thousand, six hundred ninety-seven".