166040265 has 16 divisors (see below), whose sum is σ = 266728896. Its totient is φ = 88200000.

The previous prime is 166040261. The next prime is 166040267. The reversal of 166040265 is 562040661.

166040265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166040265 - 2² = 166040261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166040261) 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, 18286 + ... + 25815.

It is an arithmetic number, because the mean of its divisors is an integer number (16670556).

Almost surely, 2^166040265 is an apocalyptic number.

166040265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166040265 is a deficient number, since it is larger than the sum of its proper divisors (100688631).

166040265 is a wasteful number, since it uses less digits than its factorization.

166040265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44360.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 166040265 is about 12885.6612170272. The cubic root of 166040265 is about 549.6308983591.

The spelling of 166040265 in words is "one hundred sixty-six million, forty thousand, two hundred sixty-five".