1660245566 has 16 divisors (see below), whose sum is σ = 2912325504. Its totient is φ = 694986264.

The previous prime is 1660245553. The next prime is 1660245569. The reversal of 1660245566 is 6655420661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660245569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378340 + ... + 1379543.

It is an arithmetic number, because the mean of its divisors is an integer number (182020344).

Almost surely, 2^1660245566 is an apocalyptic number.

1660245566 is a deficient number, since it is larger than the sum of its proper divisors (1252079938).

1660245566 is a wasteful number, since it uses less digits than its factorization.

1660245566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757935.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 1660245566 is about 40746.1110536944. Note that the first 3 decimals coincide. The cubic root of 1660245566 is about 1184.1065306013.

The spelling of 1660245566 in words is "one billion, six hundred sixty million, two hundred forty-five thousand, five hundred sixty-six".