165670720156 has 12 divisors (see below), whose sum is σ = 289930936680. Its totient is φ = 82833309680.

The previous prime is 165670720123. The next prime is 165670720157. The reversal of 165670720156 is 651027076561.

It is a happy number.

165670720156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165670720157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323011 + ... + 660058.

It is an arithmetic number, because the mean of its divisors is an integer number (24160911390).

Almost surely, 2^165670720156 is an apocalyptic number.

It is an amenable number.

165670720156 is a deficient number, since it is larger than the sum of its proper divisors (124260216524).

165670720156 is a wasteful number, since it uses less digits than its factorization.

165670720156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025204 (or 1025202 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 165670720156 in words is "one hundred sixty-five billion, six hundred seventy million, seven hundred twenty thousand, one hundred fifty-six".