3666523566 has 16 divisors (see below), whose sum is σ = 7415442000. Its totient is φ = 1208442048.

The previous prime is 3666523507. The next prime is 3666523571. The reversal of 3666523566 is 6653256663.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3432541 + ... + 3433608.

It is an arithmetic number, because the mean of its divisors is an integer number (463465125).

Almost surely, 2^3666523566 is an apocalyptic number.

3666523566 is an abundant number, since it is smaller than the sum of its proper divisors (3748918434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3666523566 is a wasteful number, since it uses less digits than its factorization.

3666523566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866243.

The product of its digits is 3499200, while the sum is 48.

The square root of 3666523566 is about 60551.8254555550. The cubic root of 3666523566 is about 1542.0016090731.

The spelling of 3666523566 in words is "three billion, six hundred sixty-six million, five hundred twenty-three thousand, five hundred sixty-six".