165166087078 has 16 divisors (see below), whose sum is σ = 248883989184. Its totient is φ = 82205591040.

The previous prime is 165166087067. The next prime is 165166087081. The reversal of 165166087078 is 870780661561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189126 + ... + 605062.

It is an arithmetic number, because the mean of its divisors is an integer number (15555249324).

Almost surely, 2^165166087078 is an apocalyptic number.

165166087078 is a deficient number, since it is larger than the sum of its proper divisors (83717902106).

165166087078 is a wasteful number, since it uses less digits than its factorization.

165166087078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416847.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 165166087078 in words is "one hundred sixty-five billion, one hundred sixty-six million, eighty-seven thousand, seventy-eight".