145705668 has 12 divisors (see below), whose sum is σ = 339979920. Its totient is φ = 48568552.

The previous prime is 145705649. The next prime is 145705669. The reversal of 145705668 is 866507541.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (145705669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6071058 + ... + 6071081.

It is an arithmetic number, because the mean of its divisors is an integer number (28331660).

Almost surely, 2^145705668 is an apocalyptic number.

It is an amenable number.

145705668 is an abundant number, since it is smaller than the sum of its proper divisors (194274252).

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

145705668 is a wasteful number, since it uses less digits than its factorization.

145705668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12142146 (or 12142144 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 145705668 is about 12070.8602841720. The cubic root of 145705668 is about 526.2096587428.

The spelling of 145705668 in words is "one hundred forty-five million, seven hundred five thousand, six hundred sixty-eight".