210664465 has 8 divisors (see below), whose sum is σ = 275779008. Its totient is φ = 153210480.

The previous prime is 210664417. The next prime is 210664471. The reversal of 210664465 is 564466012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210664465 - 2⁹ = 210663953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210664465.

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 7 ways as a sum of consecutive naturals, for example, 1915077 + ... + 1915186.

It is an arithmetic number, because the mean of its divisors is an integer number (34472376).

Almost surely, 2^210664465 is an apocalyptic number.

It is an amenable number.

210664465 is a deficient number, since it is larger than the sum of its proper divisors (65114543).

210664465 is a wasteful number, since it uses less digits than its factorization.

210664465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830279.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 210664465 is about 14514.2848600956. The cubic root of 210664465 is about 595.0184444533.

The spelling of 210664465 in words is "two hundred ten million, six hundred sixty-four thousand, four hundred sixty-five".