3666446663 has 32 divisors (see below), whose sum is σ = 4417812480. Its totient is φ = 3005424000.

The previous prime is 3666446657. The next prime is 3666446671.

3666446663 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 3666446663 - 2⁴ = 3666446647 is a prime.

It is a super-2 number, since 2×3666446663² = 26885662265247671138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666446653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390581 + ... + 399857.

It is an arithmetic number, because the mean of its divisors is an integer number (138056640).

Almost surely, 2^3666446663 is an apocalyptic number.

3666446663 is a deficient number, since it is larger than the sum of its proper divisors (751365817).

3666446663 is a wasteful number, since it uses less digits than its factorization.

3666446663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399.

The product of its digits is 6718464, while the sum is 50.

The square root of 3666446663 is about 60551.1904342103. The cubic root of 3666446663 is about 1541.9908281633.

The spelling of 3666446663 in words is "three billion, six hundred sixty-six million, four hundred forty-six thousand, six hundred sixty-three".