66250464 has 96 divisors (see below), whose sum is σ = 200019456. Its totient is φ = 18808320.

The previous prime is 66250433. The next prime is 66250469. The reversal of 66250464 is 46405266.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66250469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208834 + ... + 209150.

It is an arithmetic number, because the mean of its divisors is an integer number (2083536).

Almost surely, 2^66250464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66250464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100009728).

66250464 is an abundant number, since it is smaller than the sum of its proper divisors (133768992).

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

66250464 is a wasteful number, since it uses less digits than its factorization.

66250464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 66250464 is about 8139.4388012934. The cubic root of 66250464 is about 404.6345613802.

The spelling of 66250464 in words is "sixty-six million, two hundred fifty thousand, four hundred sixty-four".