690228665 has 16 divisors (see below), whose sum is σ = 950382720. Its totient is φ = 471408000.

The previous prime is 690228659. The next prime is 690228683. The reversal of 690228665 is 566822096.

It is not a de Polignac number, because 690228665 - 2⁶ = 690228601 is a prime.

It is an unprimeable number.

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, 30500 + ... + 48069.

It is an arithmetic number, because the mean of its divisors is an integer number (59398920).

Almost surely, 2^690228665 is an apocalyptic number.

It is an amenable number.

690228665 is a deficient number, since it is larger than the sum of its proper divisors (260154055).

690228665 is a wasteful number, since it uses less digits than its factorization.

690228665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78832.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 690228665 is about 26272.2032764669. The cubic root of 690228665 is about 883.7531955202.

The spelling of 690228665 in words is "six hundred ninety million, two hundred twenty-eight thousand, six hundred sixty-five".