1666342748 has 24 divisors (see below), whose sum is σ = 3362184672. Its totient is φ = 707825664.

The previous prime is 1666342739. The next prime is 1666342763. The reversal of 1666342748 is 8472436661.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260165 + ... + 266492.

It is an arithmetic number, because the mean of its divisors is an integer number (140091028).

Almost surely, 2^1666342748 is an apocalyptic number.

It is an amenable number.

1666342748 is an abundant number, since it is smaller than the sum of its proper divisors (1695841924).

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

1666342748 is a wasteful number, since it uses less digits than its factorization.

1666342748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526781 (or 526779 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 1666342748 is about 40820.8616763537. The cubic root of 1666342748 is about 1185.5542869110.

The spelling of 1666342748 in words is "one billion, six hundred sixty-six million, three hundred forty-two thousand, seven hundred forty-eight".