1660603066 has 4 divisors (see below), whose sum is σ = 2490904602. Its totient is φ = 830301532.

The previous prime is 1660603037. The next prime is 1660603069. The reversal of 1660603066 is 6603060661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1251390625 + 409212441 = 35375^2 + 20229^2 .

It is not an unprimeable number, because it can be changed into a prime (1660603069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415150765 + ... + 415150768.

Almost surely, 2^1660603066 is an apocalyptic number.

1660603066 is a deficient number, since it is larger than the sum of its proper divisors (830301536).

1660603066 is an equidigital number, since it uses as much as digits as its factorization.

1660603066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830301535.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 1660603066 is about 40750.4977392915. The cubic root of 1660603066 is about 1184.1915155603.

The spelling of 1660603066 in words is "one billion, six hundred sixty million, six hundred three thousand, sixty-six".