166541650154 has 48 divisors (see below), whose sum is σ = 276805627560. Its totient is φ = 75091209600.

The previous prime is 166541650103. The next prime is 166541650273. The reversal of 166541650154 is 451056145661.

It can be written as a sum of positive squares in 4 ways, for example, as 164817324529 + 1724325625 = 405977^2 + 41525^2 .

It is a super-2 number, since 2×166541650154² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19295912 + ... + 19304540.

Almost surely, 2^166541650154 is an apocalyptic number.

166541650154 is a deficient number, since it is larger than the sum of its proper divisors (110263977406).

166541650154 is a wasteful number, since it uses less digits than its factorization.

166541650154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9287 (or 9276 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 166541650154 in words is "one hundred sixty-six billion, five hundred forty-one million, six hundred fifty thousand, one hundred fifty-four".