735661 has 8 divisors (see below), whose sum is σ = 800000. Its totient is φ = 673920.

The previous prime is 735659. The next prime is 735673. The reversal of 735661 is 166537.

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

It is a cyclic number.

It is not a de Polignac number, because 735661 - 2¹ = 735659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (735061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (100000).

2⁷³⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

735661 is a deficient number, since it is larger than the sum of its proper divisors (64339).

735661 is a wasteful number, since it uses less digits than its factorization.

735661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299.

The product of its digits is 3780, while the sum is 28.

The square root of 735661 is about 857.7068263690. The cubic root of 735661 is about 90.2732845592.

The spelling of 735661 in words is "seven hundred thirty-five thousand, six hundred sixty-one".