1668385252 has 12 divisors (see below), whose sum is σ = 2935986480. Its totient is φ = 829531976.

The previous prime is 1668385237. The next prime is 1668385267. The reversal of 1668385252 is 2525838661.

It is an interprime number because it is at equal distance from previous prime (1668385237) and next prime (1668385267).

It is a super-2 number, since 2×1668385252² = 5567018698182207008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164358 + ... + 1165789.

It is an arithmetic number, because the mean of its divisors is an integer number (244665540).

Almost surely, 2^1668385252 is an apocalyptic number.

It is an amenable number.

1668385252 is a deficient number, since it is larger than the sum of its proper divisors (1267601228).

1668385252 is a wasteful number, since it uses less digits than its factorization.

1668385252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330330 (or 2330328 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 1668385252 is about 40845.8719089212. The cubic root of 1668385252 is about 1186.0384831491.

The spelling of 1668385252 in words is "one billion, six hundred sixty-eight million, three hundred eighty-five thousand, two hundred fifty-two".