3661799 has 4 divisors (see below), whose sum is σ = 3680400. Its totient is φ = 3643200.

The previous prime is 3661781. The next prime is 3661831. The reversal of 3661799 is 9971663.

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: 9971663 = 13 ⋅767051.

It is a cyclic number.

It is not a de Polignac number, because 3661799 - 2⁸ = 3661543 is a prime.

It is an Ulam 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 (3661739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9002 + ... + 9399.

It is an arithmetic number, because the mean of its divisors is an integer number (920100).

Almost surely, 2^3661799 is an apocalyptic number.

3661799 is a deficient number, since it is larger than the sum of its proper divisors (18601).

3661799 is a wasteful number, since it uses less digits than its factorization.

3661799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18600.

The product of its digits is 61236, while the sum is 41.

The square root of 3661799 is about 1913.5827653906. The cubic root of 3661799 is about 154.1338999594.

The spelling of 3661799 in words is "three million, six hundred sixty-one thousand, seven hundred ninety-nine".