749668 has 6 divisors (see below), whose sum is σ = 1311926. Its totient is φ = 374832.

The previous prime is 749659. The next prime is 749677. The reversal of 749668 is 866947.

It is an interprime number because it is at equal distance from previous prime (749659) and next prime (749677).

It can be written as a sum of positive squares in only one way, i.e., 675684 + 73984 = 822^2 + 272^2 .

It is a super-2 number, since 2×749668² = 1124004220448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 749668.

It is an unprimeable number.

749668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93705 + ... + 93712.

2⁷⁴⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

749668 is a deficient number, since it is larger than the sum of its proper divisors (562258).

749668 is a wasteful number, since it uses less digits than its factorization.

749668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187421 (or 187419 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 749668 is about 865.8337022778. The cubic root of 749668 is about 90.8426213510.

The spelling of 749668 in words is "seven hundred forty-nine thousand, six hundred sixty-eight".