1331665516 has 6 divisors (see below), whose sum is σ = 2330414660. Its totient is φ = 665832756.

The previous prime is 1331665513. The next prime is 1331665541. The reversal of 1331665516 is 6155661331.

It is not an unprimeable number, because it can be changed into a prime (1331665513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166458186 + ... + 166458193.

Almost surely, 2^1331665516 is an apocalyptic number.

It is an amenable number.

1331665516 is a deficient number, since it is larger than the sum of its proper divisors (998749144).

1331665516 is a wasteful number, since it uses less digits than its factorization.

1331665516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332916383 (or 332916381 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

The square root of 1331665516 is about 36491.9924915042. The cubic root of 1331665516 is about 1100.1833071925.

The spelling of 1331665516 in words is "one billion, three hundred thirty-one million, six hundred sixty-five thousand, five hundred sixteen".