1667349988 has 6 divisors (see below), whose sum is σ = 2917862486. Its totient is φ = 833674992.

The previous prime is 1667349913. The next prime is 1667349989. The reversal of 1667349988 is 8899437661.

It can be written as a sum of positive squares in only one way, i.e., 1534132224 + 133217764 = 39168^2 + 11542^2 .

It is not an unprimeable number, because it can be changed into a prime (1667349989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208418745 + ... + 208418752.

Almost surely, 2^1667349988 is an apocalyptic number.

It is an amenable number.

1667349988 is a deficient number, since it is larger than the sum of its proper divisors (1250512498).

1667349988 is a wasteful number, since it uses less digits than its factorization.

1667349988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416837501 (or 416837499 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The square root of 1667349988 is about 40833.1971317456. The cubic root of 1667349988 is about 1185.7931127626.

The spelling of 1667349988 in words is "one billion, six hundred sixty-seven million, three hundred forty-nine thousand, nine hundred eighty-eight".