16560166497 has 64 divisors (see below), whose sum is σ = 28137922560. Its totient is φ = 8440464384.

The previous prime is 16560166487. The next prime is 16560166499. The reversal of 16560166497 is 79466106561.

It is not a de Polignac number, because 16560166497 - 2⁴ = 16560166481 is a prime.

It is a super-2 number, since 2×16560166497² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (16560166499) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 885748 + ... + 904250.

It is an arithmetic number, because the mean of its divisors is an integer number (439655040).

Almost surely, 2^16560166497 is an apocalyptic number.

16560166497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16560166497 is a deficient number, since it is larger than the sum of its proper divisors (11577756063).

16560166497 is a wasteful number, since it uses less digits than its factorization.

16560166497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18662.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 16560166497 in words is "sixteen billion, five hundred sixty million, one hundred sixty-six thousand, four hundred ninety-seven".