6662564450 has 12 divisors (see below), whose sum is σ = 12392369970. Its totient is φ = 2665025760.

The previous prime is 6662564413. The next prime is 6662564459. The reversal of 6662564450 is 544652666.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4219931521 + 2442632929 = 64961^2 + 49423^2 .

It is not an unprimeable number, because it can be changed into a prime (6662564459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66625595 + ... + 66625694.

Almost surely, 2^6662564450 is an apocalyptic number.

6662564450 is a deficient number, since it is larger than the sum of its proper divisors (5729805520).

6662564450 is a wasteful number, since it uses less digits than its factorization.

6662564450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133251301 (or 133251296 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 6662564450 is about 81624.5333830461. The cubic root of 6662564450 is about 1881.6859451872.

The spelling of 6662564450 in words is "six billion, six hundred sixty-two million, five hundred sixty-four thousand, four hundred fifty".