145345666 has 8 divisors (see below), whose sum is σ = 220177404. Its totient is φ = 71953200.

The previous prime is 145345661. The next prime is 145345703. The reversal of 145345666 is 666543541.

It can be written as a sum of positive squares in 2 ways, for example, as 123676641 + 21669025 = 11121^2 + 4655^2 .

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

It is a super-2 number, since 2×145345666² = 42250725249967112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145345661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359565 + ... + 359968.

Almost surely, 2^145345666 is an apocalyptic number.

145345666 is a deficient number, since it is larger than the sum of its proper divisors (74831738).

145345666 is a wasteful number, since it uses less digits than its factorization.

145345666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719636.

The product of its digits is 259200, while the sum is 40.

The square root of 145345666 is about 12055.9390343515. The cubic root of 145345666 is about 525.7759241615.

The spelling of 145345666 in words is "one hundred forty-five million, three hundred forty-five thousand, six hundred sixty-six".