377661 has 4 divisors (see below), whose sum is σ = 503552. Its totient is φ = 251772.

The previous prime is 377653. The next prime is 377681. The reversal of 377661 is 166773.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 377661 - 2³ = 377653 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (377681) 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 3 ways as a sum of consecutive naturals, for example, 62941 + ... + 62946.

It is an arithmetic number, because the mean of its divisors is an integer number (125888).

2³⁷⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

377661 is a deficient number, since it is larger than the sum of its proper divisors (125891).

377661 is a wasteful number, since it uses less digits than its factorization.

377661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125890.

The product of its digits is 5292, while the sum is 30.

The square root of 377661 is about 614.5412923474. The cubic root of 377661 is about 72.2826466926.

The spelling of 377661 in words is "three hundred seventy-seven thousand, six hundred sixty-one".