1299465668 has 12 divisors (see below), whose sum is σ = 2274481020. Its totient is φ = 649613952.

The previous prime is 1299465649. The next prime is 1299465701. The reversal of 1299465668 is 8665649921.

It can be written as a sum of positive squares in 2 ways, for example, as 761318464 + 538147204 = 27592^2 + 23198^2 .

It is a super-2 number, since 2×1299465668² = 3377222044621372448, 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, 2321 + ... + 51032.

It is an arithmetic number, because the mean of its divisors is an integer number (189540085).

Almost surely, 2^1299465668 is an apocalyptic number.

It is an amenable number.

1299465668 is a deficient number, since it is larger than the sum of its proper divisors (975015352).

1299465668 is a wasteful number, since it uses less digits than its factorization.

1299465668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59446 (or 59444 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 56.

The square root of 1299465668 is about 36048.1021414443. The cubic root of 1299465668 is about 1091.2433327896.

The spelling of 1299465668 in words is "one billion, two hundred ninety-nine million, four hundred sixty-five thousand, six hundred sixty-eight".