745557665 has 16 divisors (see below), whose sum is σ = 929638080. Its totient is φ = 573316800.

The previous prime is 745557641. The next prime is 745557667. The reversal of 745557665 is 566755547.

It is a de Polignac number, because none of the positive numbers 2^k-745557665 is a prime.

It is not an unprimeable number, because it can be changed into a prime (745557667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21590 + ... + 44240.

It is an arithmetic number, because the mean of its divisors is an integer number (58102380).

Almost surely, 2^745557665 is an apocalyptic number.

It is an amenable number.

745557665 is a deficient number, since it is larger than the sum of its proper divisors (184080415).

745557665 is a wasteful number, since it uses less digits than its factorization.

745557665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22912.

The product of its digits is 4410000, while the sum is 50.

The square root of 745557665 is about 27304.9018493017. The cubic root of 745557665 is about 906.7629078171.

The spelling of 745557665 in words is "seven hundred forty-five million, five hundred fifty-seven thousand, six hundred sixty-five".