1662636712 has 64 divisors (see below), whose sum is σ = 3499666560. Its totient is φ = 734073600.

The previous prime is 1662636709. The next prime is 1662636713. The reversal of 1662636712 is 2176362661.

It is not an unprimeable number, because it can be changed into a prime (1662636713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478662 + ... + 482122.

It is an arithmetic number, because the mean of its divisors is an integer number (54682290).

Almost surely, 2^1662636712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662636712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749833280).

1662636712 is an abundant number, since it is smaller than the sum of its proper divisors (1837029848).

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

1662636712 is a wasteful number, since it uses less digits than its factorization.

1662636712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634 (or 3630 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 1662636712 is about 40775.4425113940. The cubic root of 1662636712 is about 1184.6747223310.

The spelling of 1662636712 in words is "one billion, six hundred sixty-two million, six hundred thirty-six thousand, seven hundred twelve".