1601661704 has 16 divisors (see below), whose sum is σ = 3005311020. Its totient is φ = 800245440.

The previous prime is 1601661701. The next prime is 1601661709. The reversal of 1601661704 is 4071661061.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1460004100 + 141657604 = 38210^2 + 11902^2 .

It is not an unprimeable number, because it can be changed into a prime (1601661701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61439 + ... + 83534.

Almost surely, 2^1601661704 is an apocalyptic number.

It is an amenable number.

1601661704 is a deficient number, since it is larger than the sum of its proper divisors (1403649316).

1601661704 is a wasteful number, since it uses less digits than its factorization.

1601661704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146360 (or 146356 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1601661704 is about 40020.7659097124. The cubic root of 1601661704 is about 1170.0118595238.

The spelling of 1601661704 in words is "one billion, six hundred one million, six hundred sixty-one thousand, seven hundred four".