166775626440 has 48 divisors (see below), whose sum is σ = 542020787100. Its totient is φ = 44473500288.

The previous prime is 166775626411. The next prime is 166775626453. The reversal of 166775626440 is 44626577661.

166775626440 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 7 + 5 + 626 + 4 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 155521387044 + 11254239396 = 394362^2 + 106086^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 231632455 + ... + 231633174.

Almost surely, 2^166775626440 is an apocalyptic number.

166775626440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166775626440 is an abundant number, since it is smaller than the sum of its proper divisors (375245160660).

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

166775626440 is a wasteful number, since it uses less digits than its factorization.

166775626440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463265646 (or 463265639 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 166775626440 in words is "one hundred sixty-six billion, seven hundred seventy-five million, six hundred twenty-six thousand, four hundred forty".