166445066515 has 32 divisors (see below), whose sum is σ = 247298688000. Its totient is φ = 104723328384.

The previous prime is 166445066453. The next prime is 166445066533. The reversal of 166445066515 is 515660544661.

It is a cyclic number.

It is not a de Polignac number, because 166445066515 - 2¹³ = 166445058323 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1019265 + ... + 1171234.

It is an arithmetic number, because the mean of its divisors is an integer number (7728084000).

Almost surely, 2^166445066515 is an apocalyptic number.

166445066515 is a deficient number, since it is larger than the sum of its proper divisors (80853621485).

166445066515 is a wasteful number, since it uses less digits than its factorization.

166445066515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190691.

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 166445066515 in words is "one hundred sixty-six billion, four hundred forty-five million, sixty-six thousand, five hundred fifteen".