66464450 has 24 divisors (see below), whose sum is σ = 133134708. Its totient is φ = 24540480.

The previous prime is 66464443. The next prime is 66464459. The reversal of 66464450 is 5446466.

It can be written as a sum of positive squares in 6 ways, for example, as 28185481 + 38278969 = 5309^2 + 6187^2 .

It is a super-2 number, since 2×66464450² = 8835046227605000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66464450.

It is not an unprimeable number, because it can be changed into a prime (66464459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50477 + ... + 51776.

Almost surely, 2^66464450 is an apocalyptic number.

66464450 is an abundant number, since it is smaller than the sum of its proper divisors (66670258).

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

66464450 is a wasteful number, since it uses less digits than its factorization.

66464450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102278 (or 102273 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 66464450 is about 8152.5732134094. The cubic root of 66464450 is about 405.0697436157.

The spelling of 66464450 in words is "sixty-six million, four hundred sixty-four thousand, four hundred fifty".