740661 has 8 divisors (see below), whose sum is σ = 992640. Its totient is φ = 491232.

The previous prime is 740659. The next prime is 740671. The reversal of 740661 is 166047.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 740661 - 2¹ = 740659 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (124080).

2⁷⁴⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

740661 is a deficient number, since it is larger than the sum of its proper divisors (251979).

740661 is a wasteful number, since it uses less digits than its factorization.

740661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 740661 is about 860.6166393929. The cubic root of 740661 is about 90.4773403582.

The spelling of 740661 in words is "seven hundred forty thousand, six hundred sixty-one".