3666650249 has 4 divisors (see below), whose sum is σ = 3669185664. Its totient is φ = 3664114836.

The previous prime is 3666650233. The next prime is 3666650263. The reversal of 3666650249 is 9420566663.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9420566663 = 82153 ⋅114671.

It is a cyclic number.

It is not a de Polignac number, because 3666650249 - 2⁴ = 3666650233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3666650849) 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, 1265537 + ... + 1268430.

It is an arithmetic number, because the mean of its divisors is an integer number (917296416).

Almost surely, 2^3666650249 is an apocalyptic number.

It is an amenable number.

3666650249 is a deficient number, since it is larger than the sum of its proper divisors (2535415).

3666650249 is a wasteful number, since it uses less digits than its factorization.

3666650249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535414.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The square root of 3666650249 is about 60552.8715173773. The cubic root of 3666650249 is about 1542.0193682334.

The spelling of 3666650249 in words is "three billion, six hundred sixty-six million, six hundred fifty thousand, two hundred forty-nine".