742708665 has 24 divisors (see below), whose sum is σ = 1363090248. Its totient is φ = 372810240.

The previous prime is 742708661. The next prime is 742708691. The reversal of 742708665 is 566807247.

742708665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 61968384 + 680740281 = 7872^2 + 26091^2 .

It is not a de Polignac number, because 742708665 - 2² = 742708661 is a prime.

It is a super-2 number, since 2×742708665² = 1103232322132164450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 742708665.

It is not an unprimeable number, because it can be changed into a prime (742708661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484666 + ... + 486195.

It is an arithmetic number, because the mean of its divisors is an integer number (56795427).

Almost surely, 2^742708665 is an apocalyptic number.

It is an amenable number.

742708665 is a deficient number, since it is larger than the sum of its proper divisors (620381583).

742708665 is a wasteful number, since it uses less digits than its factorization.

742708665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970889 (or 970886 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 742708665 is about 27252.6817946418. The cubic root of 742708665 is about 905.6064289122.

The spelling of 742708665 in words is "seven hundred forty-two million, seven hundred eight thousand, six hundred sixty-five".