166436561260555 has 8 divisors (see below), whose sum is σ = 199724389634592. Its totient is φ = 133148904927168.

The previous prime is 166436561260513. The next prime is 166436561260591. The reversal of 166436561260555 is 555062165634661.

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 166436561260555 - 2¹³ = 166436561252363 is a prime.

It is a super-2 number, since 2×166436561260555² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166436561260493 and 166436561260502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40872162 + ... + 44759431.

It is an arithmetic number, because the mean of its divisors is an integer number (24965548704324).

Almost surely, 2^{166436561260555} is an apocalyptic number.

166436561260555 is a deficient number, since it is larger than the sum of its proper divisors (33287828374037).

166436561260555 is an equidigital number, since it uses as much as digits as its factorization.

166436561260555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86020325.

The product of its (nonzero) digits is 116640000, while the sum is 61.

The spelling of 166436561260555 in words is "one hundred sixty-six trillion, four hundred thirty-six billion, five hundred sixty-one million, two hundred sixty thousand, five hundred fifty-five".