3666049749 has 12 divisors (see below), whose sum is σ = 5311407712. Its totient is φ = 2436647400.

The previous prime is 3666049733. The next prime is 3666049763. The reversal of 3666049749 is 9479406663.

It is not a de Polignac number, because 3666049749 - 2⁴ = 3666049733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3666049695 and 3666049704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666049769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612337 + ... + 618294.

Almost surely, 2^3666049749 is an apocalyptic number.

It is an amenable number.

3666049749 is a deficient number, since it is larger than the sum of its proper divisors (1645357963).

3666049749 is a wasteful number, since it uses less digits than its factorization.

3666049749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230968 (or 1230965 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The square root of 3666049749 is about 60547.9128376858. The cubic root of 3666049749 is about 1541.9351830214.

The spelling of 3666049749 in words is "three billion, six hundred sixty-six million, forty-nine thousand, seven hundred forty-nine".