375661 has 16 divisors (see below), whose sum is σ = 459648. Its totient is φ = 302400.

The previous prime is 375647. The next prime is 375667. The reversal of 375661 is 166573.

It is a cyclic number.

It is not a de Polignac number, because 375661 - 2⁷ = 375533 is a prime.

It is a super-2 number, since 2×375661² = 282242373842, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (375667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2³⁷⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

375661 is a deficient number, since it is larger than the sum of its proper divisors (83987).

375661 is a wasteful number, since it uses less digits than its factorization.

375661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

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

The square root of 375661 is about 612.9119023155. The cubic root of 375661 is about 72.1548237323.

The spelling of 375661 in words is "three hundred seventy-five thousand, six hundred sixty-one".