166156655061 has 8 divisors (see below), whose sum is σ = 221544548320. Its totient is φ = 110769932592.

The previous prime is 166156655057. The next prime is 166156655083. The reversal of 166156655061 is 160556651661.

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

It is not a de Polignac number, because 166156655061 - 2² = 166156655057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166156655061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166156657061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122646 + ... + 589368.

It is an arithmetic number, because the mean of its divisors is an integer number (27693068540).

Almost surely, 2^166156655061 is an apocalyptic number.

It is an amenable number.

166156655061 is a deficient number, since it is larger than the sum of its proper divisors (55387893259).

166156655061 is a wasteful number, since it uses less digits than its factorization.

166156655061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585395.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 166156655061 in words is "one hundred sixty-six billion, one hundred fifty-six million, six hundred fifty-five thousand, sixty-one".