1660215272 has 8 divisors (see below), whose sum is σ = 3112903650. Its totient is φ = 830107632.

The previous prime is 1660215259. The next prime is 1660215281. The reversal of 1660215272 is 2725120661.

It can be written as a sum of positive squares in only one way, i.e., 1590892996 + 69322276 = 39886^2 + 8326^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103763447 + ... + 103763462.

Almost surely, 2^1660215272 is an apocalyptic number.

It is an amenable number.

1660215272 is a deficient number, since it is larger than the sum of its proper divisors (1452688378).

1660215272 is a wasteful number, since it uses less digits than its factorization.

1660215272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207526915 (or 207526911 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1660215272 is about 40745.7393110004. The cubic root of 1660215272 is about 1184.0993285460.

The spelling of 1660215272 in words is "one billion, six hundred sixty million, two hundred fifteen thousand, two hundred seventy-two".