16668537020 has 24 divisors (see below), whose sum is σ = 35350505568. Its totient is φ = 6601400000.

The previous prime is 16668537013. The next prime is 16668537029. The reversal of 16668537020 is 2073586661.

16668537020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16668537020² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668537029) 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 7 ways as a sum of consecutive naturals, for example, 4123856 + ... + 4127895.

It is an arithmetic number, because the mean of its divisors is an integer number (1472937732).

Almost surely, 2^16668537020 is an apocalyptic number.

16668537020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16668537020 is an abundant number, since it is smaller than the sum of its proper divisors (18681968548).

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

16668537020 is a wasteful number, since it uses less digits than its factorization.

16668537020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251861 (or 8251859 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 16668537020 in words is "sixteen billion, six hundred sixty-eight million, five hundred thirty-seven thousand, twenty".