1666252748 has 24 divisors (see below), whose sum is σ = 3009652800. Its totient is φ = 806773968.

The previous prime is 1666252717. The next prime is 1666252811. The reversal of 1666252748 is 8472526661.

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, 36878 + ... + 68501.

It is an arithmetic number, because the mean of its divisors is an integer number (125402200).

Almost surely, 2^1666252748 is an apocalyptic number.

It is an amenable number.

1666252748 is a deficient number, since it is larger than the sum of its proper divisors (1343400052).

1666252748 is a wasteful number, since it uses less digits than its factorization.

1666252748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105509 (or 105507 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 1666252748 is about 40819.7592839546. The cubic root of 1666252748 is about 1185.5329424013.

The spelling of 1666252748 in words is "one billion, six hundred sixty-six million, two hundred fifty-two thousand, seven hundred forty-eight".