1661164304 has 40 divisors (see below), whose sum is σ = 3300181632. Its totient is φ = 809585280.

The previous prime is 1661164277. The next prime is 1661164313. The reversal of 1661164304 is 4034611661.

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, 369977 + ... + 374439.

Almost surely, 2^1661164304 is an apocalyptic number.

It is an amenable number.

1661164304 is a deficient number, since it is larger than the sum of its proper divisors (1639017328).

1661164304 is a wasteful number, since it uses less digits than its factorization.

1661164304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055 (or 5049 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1661164304 is about 40757.3834292635. The cubic root of 1661164304 is about 1184.3249085491.

Adding to 1661164304 its reverse (4034611661), we get a palindrome (5695775965).

The spelling of 1661164304 in words is "one billion, six hundred sixty-one million, one hundred sixty-four thousand, three hundred four".