145405666 has 8 divisors (see below), whose sum is σ = 249266880. Its totient is φ = 62316708.

The previous prime is 145405649. The next prime is 145405669. The reversal of 145405666 is 666504541.

145405666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×145405666² = 42285615409807112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145405669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5193046 + ... + 5193073.

It is an arithmetic number, because the mean of its divisors is an integer number (31158360).

Almost surely, 2^145405666 is an apocalyptic number.

145405666 is a deficient number, since it is larger than the sum of its proper divisors (103861214).

145405666 is a wasteful number, since it uses less digits than its factorization.

145405666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10386128.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 145405666 is about 12058.4271777044. The cubic root of 145405666 is about 525.8482625541.

The spelling of 145405666 in words is "one hundred forty-five million, four hundred five thousand, six hundred sixty-six".