745665065 has 4 divisors (see below), whose sum is σ = 894798084. Its totient is φ = 596532048.

The previous prime is 745665059. The next prime is 745665079. The reversal of 745665065 is 560566547.

745665065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 292273216 + 453391849 = 17096^2 + 21293^2 .

It is a cyclic number.

It is not a de Polignac number, because 745665065 - 2⁴ = 745665049 is a prime.

It is a super-2 number, since 2×745665065² = 1112032778322908450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74566502 + ... + 74566511.

It is an arithmetic number, because the mean of its divisors is an integer number (223699521).

Almost surely, 2^745665065 is an apocalyptic number.

It is an amenable number.

745665065 is a deficient number, since it is larger than the sum of its proper divisors (149133019).

745665065 is a wasteful number, since it uses less digits than its factorization.

745665065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149133018.

The product of its (nonzero) digits is 756000, while the sum is 44.

The square root of 745665065 is about 27306.8684583202. The cubic root of 745665065 is about 906.8064464393.

The spelling of 745665065 in words is "seven hundred forty-five million, six hundred sixty-five thousand, sixty-five".