166390154293 has 8 divisors (see below), whose sum is σ = 183181822560. Its totient is φ = 149876034480.

The previous prime is 166390154251. The next prime is 166390154321. The reversal of 166390154293 is 392451093661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166390154293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166390154893) 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, 69385855 + ... + 69388252.

It is an arithmetic number, because the mean of its divisors is an integer number (22897727820).

Almost surely, 2^166390154293 is an apocalyptic number.

It is an amenable number.

166390154293 is a deficient number, since it is larger than the sum of its proper divisors (16791668267).

166390154293 is a wasteful number, since it uses less digits than its factorization.

166390154293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138774227.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 166390154293 in words is "one hundred sixty-six billion, three hundred ninety million, one hundred fifty-four thousand, two hundred ninety-three".