376661 has 4 divisors (see below), whose sum is σ = 378924. Its totient is φ = 374400.

The previous prime is 376657. The next prime is 376679. The reversal of 376661 is 166673.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166673 = 13 ⋅12821.

It can be written as a sum of positive squares in 2 ways, for example, as 52900 + 323761 = 230^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 376661 - 2² = 376657 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 (376631) 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 3 ways as a sum of consecutive naturals, for example, 860 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (94731).

2³⁷⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

376661 is a deficient number, since it is larger than the sum of its proper divisors (2263).

376661 is a wasteful number, since it uses less digits than its factorization.

376661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its digits is 4536, while the sum is 29.

The square root of 376661 is about 613.7271380671. The cubic root of 376661 is about 72.2187917722.

The spelling of 376661 in words is "three hundred seventy-six thousand, six hundred sixty-one".