353661 has 16 divisors (see below), whose sum is σ = 588288. Its totient is φ = 183600.

The previous prime is 353657. The next prime is 353677. The reversal of 353661 is 166353.

It is not a de Polignac number, because 353661 - 2² = 353657 is a prime.

It is a super-2 number, since 2×353661² = 250152205842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535 + ... + 996.

It is an arithmetic number, because the mean of its divisors is an integer number (36768).

2³⁵³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

353661 is a deficient number, since it is larger than the sum of its proper divisors (234627).

353661 is a wasteful number, since it uses less digits than its factorization.

353661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552.

The product of its digits is 1620, while the sum is 24.

The square root of 353661 is about 594.6940389814. The cubic root of 353661 is about 70.7178513514.

The spelling of 353661 in words is "three hundred fifty-three thousand, six hundred sixty-one".