3761661 has 4 divisors (see below), whose sum is σ = 5015552. Its totient is φ = 2507772.

The previous prime is 3761647. The next prime is 3761669. The reversal of 3761661 is 1661673.

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 3761661 - 2⁵ = 3761629 is a prime.

It is a D-number.

It is the 1940-th Hogben 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 (3761669) by changing a digit.

It is a nontrivial repunit in base 1939.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626941 + ... + 626946.

It is an arithmetic number, because the mean of its divisors is an integer number (1253888).

Almost surely, 2^3761661 is an apocalyptic number.

It is an amenable number.

3761661 is a deficient number, since it is larger than the sum of its proper divisors (1253891).

3761661 is a wasteful number, since it uses less digits than its factorization.

3761661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253890.

The product of its digits is 4536, while the sum is 30.

The square root of 3761661 is about 1939.5001933488. The cubic root of 3761661 is about 155.5224961681.

The spelling of 3761661 in words is "three million, seven hundred sixty-one thousand, six hundred sixty-one".