166616380079 has 8 divisors (see below), whose sum is σ = 167267814912. Its totient is φ = 165966073120.

The previous prime is 166616380069. The next prime is 166616380121. The reversal of 166616380079 is 970083616661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166616380079 is a prime.

It is a super-2 number, since 2×166616380079² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166616380079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166616380009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14669 + ... + 577449.

It is an arithmetic number, because the mean of its divisors is an integer number (20908476864).

Almost surely, 2^166616380079 is an apocalyptic number.

166616380079 is a deficient number, since it is larger than the sum of its proper divisors (651434833).

166616380079 is an equidigital number, since it uses as much as digits as its factorization.

166616380079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563937.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 166616380079 in words is "one hundred sixty-six billion, six hundred sixteen million, three hundred eighty thousand, seventy-nine".