253640166 has 32 divisors (see below), whose sum is σ = 551332320. Its totient is φ = 77324544.

The previous prime is 253640161. The next prime is 253640173. The reversal of 253640166 is 661046352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253640161) 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, 6415 + ... + 23418.

It is an arithmetic number, because the mean of its divisors is an integer number (17229135).

Almost surely, 2^253640166 is an apocalyptic number.

253640166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

253640166 is an abundant number, since it is smaller than the sum of its proper divisors (297692154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253640166 is a wasteful number, since it uses less digits than its factorization.

253640166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29960.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 253640166 is about 15926.0844528716. The cubic root of 253640166 is about 633.0033517089.

The spelling of 253640166 in words is "two hundred fifty-three million, six hundred forty thousand, one hundred sixty-six".