1662648968 has 16 divisors (see below), whose sum is σ = 3118297500. Its totient is φ = 831102976.

The previous prime is 1662648881. The next prime is 1662648991. The reversal of 1662648968 is 8698462661.

It can be written as a sum of positive squares in 2 ways, for example, as 1651772164 + 10876804 = 40642^2 + 3298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6728 + ... + 58056.

Almost surely, 2^1662648968 is an apocalyptic number.

It is an amenable number.

1662648968 is a deficient number, since it is larger than the sum of its proper divisors (1455648532).

1662648968 is a wasteful number, since it uses less digits than its factorization.

1662648968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55384 (or 55380 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The square root of 1662648968 is about 40775.5927976529. The cubic root of 1662648968 is about 1184.6776332370.

The spelling of 1662648968 in words is "one billion, six hundred sixty-two million, six hundred forty-eight thousand, nine hundred sixty-eight".