906247665 has 24 divisors (see below), whose sum is σ = 1572054120. Its totient is φ = 482955264.

The previous prime is 906247627. The next prime is 906247669. The reversal of 906247665 is 566742609.

906247665 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 123143409 + 783104256 = 11097^2 + 27984^2 .

It is not a de Polignac number, because 906247665 - 2⁸ = 906247409 is a prime.

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 906247665.

It is not an unprimeable number, because it can be changed into a prime (906247669) 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, 56259 + ... + 70551.

It is an arithmetic number, because the mean of its divisors is an integer number (65502255).

Almost surely, 2^906247665 is an apocalyptic number.

It is an amenable number.

906247665 is a deficient number, since it is larger than the sum of its proper divisors (665806455).

906247665 is a wasteful number, since it uses less digits than its factorization.

906247665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15713 (or 15710 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 906247665 is about 30103.9476647167. The cubic root of 906247665 is about 967.7183290301.

It can be divided in two parts, 90624 and 7665, that added together give a palindrome (98289).

The spelling of 906247665 in words is "nine hundred six million, two hundred forty-seven thousand, six hundred sixty-five".