1665066073 has 16 divisors (see below), whose sum is σ = 1855789056. Its totient is φ = 1481059840.

The previous prime is 1665066049. The next prime is 1665066089. The reversal of 1665066073 is 3706605661.

It is a cyclic number.

It is not a de Polignac number, because 1665066073 - 2²⁹ = 1128195161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1665066673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219561 + ... + 227017.

It is an arithmetic number, because the mean of its divisors is an integer number (115986816).

Almost surely, 2^1665066073 is an apocalyptic number.

It is an amenable number.

1665066073 is a deficient number, since it is larger than the sum of its proper divisors (190722983).

1665066073 is a wasteful number, since it uses less digits than its factorization.

1665066073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7904.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 1665066073 is about 40805.2211487697. The cubic root of 1665066073 is about 1185.2514372067.

The spelling of 1665066073 in words is "one billion, six hundred sixty-five million, sixty-six thousand, seventy-three".