166057689890 has 8 divisors (see below), whose sum is σ = 298903841820. Its totient is φ = 66423075952.

The previous prime is 166057689883. The next prime is 166057689943. The reversal of 166057689890 is 98986750661.

It can be written as a sum of positive squares in 2 ways, for example, as 160832279521 + 5225410369 = 401039^2 + 72287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 8302884485 + ... + 8302884504.

Almost surely, 2^166057689890 is an apocalyptic number.

166057689890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166057689890 is a deficient number, since it is larger than the sum of its proper divisors (132846151930).

166057689890 is a wasteful number, since it uses less digits than its factorization.

166057689890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605768996.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 166057689890 in words is "one hundred sixty-six billion, fifty-seven million, six hundred eighty-nine thousand, eight hundred ninety".