3666520345 has 16 divisors (see below), whose sum is σ = 4739106240. Its totient is φ = 2714209344.

The previous prime is 3666520343. The next prime is 3666520357. The reversal of 3666520345 is 5430256663.

It is a cyclic number.

It is not a de Polignac number, because 3666520345 - 2¹ = 3666520343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3666520298 and 3666520307.

It is not an unprimeable number, because it can be changed into a prime (3666520343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444694 + ... + 452863.

It is an arithmetic number, because the mean of its divisors is an integer number (296194140).

Almost surely, 2^3666520345 is an apocalyptic number.

It is an amenable number.

3666520345 is a deficient number, since it is larger than the sum of its proper divisors (1072585895).

3666520345 is a wasteful number, since it uses less digits than its factorization.

3666520345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897624.

The product of its (nonzero) digits is 388800, while the sum is 40.

The square root of 3666520345 is about 60551.7988584980. The cubic root of 3666520345 is about 1542.0011575292.

The spelling of 3666520345 in words is "three billion, six hundred sixty-six million, five hundred twenty thousand, three hundred forty-five".