3661678 has 4 divisors (see below), whose sum is σ = 5492520. Its totient is φ = 1830838.

The previous prime is 3661673. The next prime is 3661703. The reversal of 3661678 is 8761663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8761663 = 337 ⋅25999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915418 + ... + 915421.

It is an arithmetic number, because the mean of its divisors is an integer number (1373130).

Almost surely, 2^3661678 is an apocalyptic number.

3661678 is a deficient number, since it is larger than the sum of its proper divisors (1830842).

3661678 is a wasteful number, since it uses less digits than its factorization.

3661678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830841.

The product of its digits is 36288, while the sum is 37.

The square root of 3661678 is about 1913.5511490420. The cubic root of 3661678 is about 154.1322022140.

The spelling of 3661678 in words is "three million, six hundred sixty-one thousand, six hundred seventy-eight".