166319459741 has 4 divisors (see below), whose sum is σ = 166320856572. Its totient is φ = 166318062912.

The previous prime is 166319459737. The next prime is 166319459771. The reversal of 166319459741 is 147954913661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91902347716 + 74417112025 = 303154^2 + 272795^2 .

It is a cyclic number.

It is not a de Polignac number, because 166319459741 - 2² = 166319459737 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166319459771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501260 + ... + 764133.

It is an arithmetic number, because the mean of its divisors is an integer number (41580214143).

Almost surely, 2^166319459741 is an apocalyptic number.

It is an amenable number.

166319459741 is a deficient number, since it is larger than the sum of its proper divisors (1396831).

166319459741 is a wasteful number, since it uses less digits than its factorization.

166319459741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396830.

The product of its digits is 4898880, while the sum is 56.

The spelling of 166319459741 in words is "one hundred sixty-six billion, three hundred nineteen million, four hundred fifty-nine thousand, seven hundred forty-one".