145666667 has 4 divisors (see below), whose sum is σ = 146084400. Its totient is φ = 145248936.

The previous prime is 145666663. The next prime is 145666687. The reversal of 145666667 is 766666541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145666667 - 2² = 145666663 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (145666663) 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, 208343 + ... + 209040.

It is an arithmetic number, because the mean of its divisors is an integer number (36521100).

Almost surely, 2^145666667 is an apocalyptic number.

145666667 is a deficient number, since it is larger than the sum of its proper divisors (417733).

145666667 is an equidigital number, since it uses as much as digits as its factorization.

145666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417732.

The product of its digits is 1088640, while the sum is 47.

The square root of 145666667 is about 12069.2446739637. The cubic root of 145666667 is about 526.1627044169.

The spelling of 145666667 in words is "one hundred forty-five million, six hundred sixty-six thousand, six hundred sixty-seven".