166496641599 has 8 divisors (see below), whose sum is σ = 221997698352. Its totient is φ = 110996672960.

The previous prime is 166496641573. The next prime is 166496641651. The reversal of 166496641599 is 995146694661.

It is a happy number.

It is a Cunningham number, because it is equal to 408040²-1.

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

It is a cyclic number.

It is not a de Polignac number, because 166496641599 - 2¹⁷ = 166496510527 is a prime.

It is a super-2 number, since 2×166496641599² (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 (166496641099) 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, 204019 + ... + 612059.

It is an arithmetic number, because the mean of its divisors is an integer number (27749712294).

Almost surely, 2^166496641599 is an apocalyptic number.

166496641599 is a deficient number, since it is larger than the sum of its proper divisors (55501056753).

166496641599 is a wasteful number, since it uses less digits than its factorization.

166496641599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544057.

The product of its digits is 75582720, while the sum is 66.

The spelling of 166496641599 in words is "one hundred sixty-six billion, four hundred ninety-six million, six hundred forty-one thousand, five hundred ninety-nine".