166357753661 has 8 divisors (see below), whose sum is σ = 181518364800. Its totient is φ = 151203339040.

The previous prime is 166357753643. The next prime is 166357753741.

166357753661 is nontrivially palindromic in base 10.

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-166357753661 is a prime.

It is a super-5 number, since 5×166357753661⁵ (a number of 57 digits) contains 55555 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166357753597 and 166357753606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166357752661) 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, 1492901 + ... + 1600458.

It is an arithmetic number, because the mean of its divisors is an integer number (22689795600).

Almost surely, 2^166357753661 is an apocalyptic number.

166357753661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166357753661 is a deficient number, since it is larger than the sum of its proper divisors (15160611139).

166357753661 is a wasteful number, since it uses less digits than its factorization.

166357753661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098259.

The product of its digits is 14288400, while the sum is 56.

The spelling of 166357753661 in words is "one hundred sixty-six billion, three hundred fifty-seven million, seven hundred fifty-three thousand, six hundred sixty-one".