165151166565603 has 32 divisors (see below), whose sum is σ = 241254603394560. Its totient is φ = 100026038336000.

The previous prime is 165151166565563. The next prime is 165151166565611. The reversal of 165151166565603 is 306565661151561.

It is a happy number.

It is not a de Polignac number, because 165151166565603 - 2⁸ = 165151166565347 is a prime.

It is a super-2 number, since 2×165151166565603² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165151166565673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8007273 + ... + 19859978.

It is an arithmetic number, because the mean of its divisors is an integer number (7539206356080).

Almost surely, 2^{165151166565603} is an apocalyptic number.

165151166565603 is a deficient number, since it is larger than the sum of its proper divisors (76103436828957).

165151166565603 is a wasteful number, since it uses less digits than its factorization.

165151166565603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27871307.

The product of its (nonzero) digits is 14580000, while the sum is 57.

The spelling of 165151166565603 in words is "one hundred sixty-five trillion, one hundred fifty-one billion, one hundred sixty-six million, five hundred sixty-five thousand, six hundred three".