16681675527407 has 16 divisors (see below), whose sum is σ = 18258123147264. Its totient is φ = 15115220064000.

The previous prime is 16681675527401. The next prime is 16681675527463. The reversal of 16681675527407 is 70472557618661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16681675527407 - 2⁸ = 16681675527151 is a prime.

It is a super-2 number, since 2×16681675527407² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681675527401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117181682 + ... + 117323952.

It is an arithmetic number, because the mean of its divisors is an integer number (1141132696704).

Almost surely, 2^{16681675527407} is an apocalyptic number.

16681675527407 is a deficient number, since it is larger than the sum of its proper divisors (1576447619857).

16681675527407 is a wasteful number, since it uses less digits than its factorization.

16681675527407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177310.

The product of its (nonzero) digits is 118540800, while the sum is 65.

The spelling of 16681675527407 in words is "sixteen trillion, six hundred eighty-one billion, six hundred seventy-five million, five hundred twenty-seven thousand, four hundred seven".