3216761668 has 6 divisors (see below), whose sum is σ = 5629332926. Its totient is φ = 1608380832.

The previous prime is 3216761629. The next prime is 3216761671. The reversal of 3216761668 is 8661676123.

It can be written as a sum of positive squares in only one way, i.e., 2966109444 + 250652224 = 54462^2 + 15832^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402095205 + ... + 402095212.

Almost surely, 2^3216761668 is an apocalyptic number.

It is an amenable number.

3216761668 is a deficient number, since it is larger than the sum of its proper divisors (2412571258).

3216761668 is a wasteful number, since it uses less digits than its factorization.

3216761668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804190421 (or 804190419 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 3216761668 is about 56716.5026072659. The cubic root of 3216761668 is about 1476.1810581522.

The spelling of 3216761668 in words is "three billion, two hundred sixteen million, seven hundred sixty-one thousand, six hundred sixty-eight".