145644665 has 16 divisors (see below), whose sum is σ = 182601216. Its totient is φ = 111388800.

The previous prime is 145644647. The next prime is 145644677. The reversal of 145644665 is 566446541.

It is not a de Polignac number, because 145644665 - 2²⁴ = 128867449 is a prime.

It is a super-3 number, since 3×145644665³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7205 + ... + 18525.

It is an arithmetic number, because the mean of its divisors is an integer number (11412576).

Almost surely, 2^145644665 is an apocalyptic number.

It is an amenable number.

145644665 is a deficient number, since it is larger than the sum of its proper divisors (36956551).

145644665 is a wasteful number, since it uses less digits than its factorization.

145644665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11440.

The product of its digits is 345600, while the sum is 41.

The square root of 145644665 is about 12068.3331491967. Note that the first 3 decimals coincide. The cubic root of 145644665 is about 526.1362119347.

The spelling of 145644665 in words is "one hundred forty-five million, six hundred forty-four thousand, six hundred sixty-five".