166919765903 has 48 divisors (see below), whose sum is σ = 208223364096. Its totient is φ = 132153396480.

The previous prime is 166919765897. The next prime is 166919765917. The reversal of 166919765903 is 309567919661.

It is not a de Polignac number, because 166919765903 - 2¹² = 166919761807 is a prime.

It is a super-2 number, since 2×166919765903² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166919765963) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2874050 + ... + 2931552.

It is an arithmetic number, because the mean of its divisors is an integer number (4337986752).

Almost surely, 2^166919765903 is an apocalyptic number.

166919765903 is a deficient number, since it is larger than the sum of its proper divisors (41303598193).

166919765903 is a wasteful number, since it uses less digits than its factorization.

166919765903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57612 (or 57593 counting only the distinct ones).

The product of its (nonzero) digits is 16533720, while the sum is 62.

The spelling of 166919765903 in words is "one hundred sixty-six billion, nine hundred nineteen million, seven hundred sixty-five thousand, nine hundred three".