166535353193 has 12 divisors (see below), whose sum is σ = 184730639940. Its totient is φ = 150006811680.

The previous prime is 166535353181. The next prime is 166535353211. The reversal of 166535353193 is 391353535661.

It can be written as a sum of positive squares in 2 ways, for example, as 71284728064 + 95250625129 = 266992^2 + 308627^2 .

It is not a de Polignac number, because 166535353193 - 2¹⁶ = 166535287657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166535353123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6300230 + ... + 6326607.

It is an arithmetic number, because the mean of its divisors is an integer number (15394219995).

Almost surely, 2^166535353193 is an apocalyptic number.

It is an amenable number.

166535353193 is a deficient number, since it is larger than the sum of its proper divisors (18195286747).

166535353193 is a wasteful number, since it uses less digits than its factorization.

166535353193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626968 (or 12626957 counting only the distinct ones).

The product of its digits is 3280500, while the sum is 50.

The spelling of 166535353193 in words is "one hundred sixty-six billion, five hundred thirty-five million, three hundred fifty-three thousand, one hundred ninety-three".