166522006655 has 8 divisors (see below), whose sum is σ = 199850126352. Its totient is φ = 133201793088.

The previous prime is 166522006631. The next prime is 166522006657. The reversal of 166522006655 is 556600225661.

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 166522006655 - 2¹⁸ = 166521744511 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 (166522006657) 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, 1930094 + ... + 2014523.

It is an arithmetic number, because the mean of its divisors is an integer number (24981265794).

Almost surely, 2^166522006655 is an apocalyptic number.

166522006655 is a deficient number, since it is larger than the sum of its proper divisors (33328119697).

166522006655 is an equidigital number, since it uses as much as digits as its factorization.

166522006655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953065.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 166522006655 in words is "one hundred sixty-six billion, five hundred twenty-two million, six thousand, six hundred fifty-five".