645245466 has 8 divisors (see below), whose sum is σ = 1290490944. Its totient is φ = 215081820.

The previous prime is 645245441. The next prime is 645245507. The reversal of 645245466 is 664542546.

645245466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

645245466 is an admirable number.

It is a super-2 number, since 2×645245466² = 832683422787114312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53770450 + ... + 53770461.

It is an arithmetic number, because the mean of its divisors is an integer number (161311368).

Almost surely, 2^645245466 is an apocalyptic number.

645245466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645245466 is a wasteful number, since it uses less digits than its factorization.

645245466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107540916.

The product of its digits is 691200, while the sum is 42.

The square root of 645245466 is about 25401.6823458605. The cubic root of 645245466 is about 864.1218508486.

The spelling of 645245466 in words is "six hundred forty-five million, two hundred forty-five thousand, four hundred sixty-six".