166839617240 has 16 divisors (see below), whose sum is σ = 375389138880. Its totient is φ = 66735846880.

The previous prime is 166839617239. The next prime is 166839617267. The reversal of 166839617240 is 42716938661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2085495176 + ... + 2085495255.

It is an arithmetic number, because the mean of its divisors is an integer number (23461821180).

Almost surely, 2^166839617240 is an apocalyptic number.

166839617240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166839617240 is an abundant number, since it is smaller than the sum of its proper divisors (208549521640).

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

166839617240 is a wasteful number, since it uses less digits than its factorization.

166839617240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170990442 (or 4170990438 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 166839617240 in words is "one hundred sixty-six billion, eight hundred thirty-nine million, six hundred seventeen thousand, two hundred forty".