1666747336 has 32 divisors (see below), whose sum is σ = 3291624000. Its totient is φ = 789034176.

The previous prime is 1666747307. The next prime is 1666747361. The reversal of 1666747336 is 6337476661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666747336.

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, 470805 + ... + 474331.

It is an arithmetic number, because the mean of its divisors is an integer number (102863250).

Almost surely, 2^1666747336 is an apocalyptic number.

It is an amenable number.

1666747336 is a deficient number, since it is larger than the sum of its proper divisors (1624876664).

1666747336 is a wasteful number, since it uses less digits than its factorization.

1666747336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661 (or 6657 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 49.

The square root of 1666747336 is about 40825.8170279543. The cubic root of 1666747336 is about 1185.6502300022.

The spelling of 1666747336 in words is "one billion, six hundred sixty-six million, seven hundred forty-seven thousand, three hundred thirty-six".