166961085 has 16 divisors (see below), whose sum is σ = 267321600. Its totient is φ = 88984640.

The previous prime is 166961083. The next prime is 166961111. The reversal of 166961085 is 580169661.

It is a happy number.

It is not a de Polignac number, because 166961085 - 2¹ = 166961083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166961083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26380 + ... + 32090.

It is an arithmetic number, because the mean of its divisors is an integer number (16707600).

Almost surely, 2^166961085 is an apocalyptic number.

166961085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166961085 is a deficient number, since it is larger than the sum of its proper divisors (100360515).

166961085 is a wasteful number, since it uses less digits than its factorization.

166961085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 166961085 is about 12921.3422290411. The cubic root of 166961085 is about 550.6450668298.

The spelling of 166961085 in words is "one hundred sixty-six million, nine hundred sixty-one thousand, eighty-five".