66354464 has 36 divisors (see below), whose sum is σ = 143599302. Its totient is φ = 30159360.

The previous prime is 66354437. The next prime is 66354467. The reversal of 66354464 is 46445366.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 94864 = 8140^2 + 308^2 .

It is not an unprimeable number, because it can be changed into a prime (66354467) 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, 4697 + ... + 12440.

Almost surely, 2^66354464 is an apocalyptic number.

It is an amenable number.

66354464 is an abundant number, since it is smaller than the sum of its proper divisors (77244838).

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

66354464 is a wasteful number, since it uses less digits than its factorization.

66354464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17169 (or 17150 counting only the distinct ones).

The product of its digits is 207360, while the sum is 38.

The square root of 66354464 is about 8145.8249428772. The cubic root of 66354464 is about 404.8461825066.

The spelling of 66354464 in words is "sixty-six million, three hundred fifty-four thousand, four hundred sixty-four".