16661671524 has 36 divisors (see below), whose sum is σ = 42121694160. Its totient is φ = 5553271920.

The previous prime is 16661671517. The next prime is 16661671529. The reversal of 16661671524 is 42517616661.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×16661671524² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16661671524.

It is not an unprimeable number, because it can be changed into a prime (16661671529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396859 + ... + 436829.

It is an arithmetic number, because the mean of its divisors is an integer number (1170047060).

Almost surely, 2^16661671524 is an apocalyptic number.

It is an amenable number.

16661671524 is an abundant number, since it is smaller than the sum of its proper divisors (25460022636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16661671524 is a wasteful number, since it uses less digits than its factorization.

16661671524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51560 (or 51555 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 16661671524 in words is "sixteen billion, six hundred sixty-one million, six hundred seventy-one thousand, five hundred twenty-four".