66150816 has 24 divisors (see below), whose sum is σ = 173646144. Its totient is φ = 22050240.

The previous prime is 66150809. The next prime is 66150839. The reversal of 66150816 is 61805166.

It is a tau number, because it is divible by the number of its divisors (24).

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, 344440 + ... + 344631.

It is an arithmetic number, because the mean of its divisors is an integer number (7235256).

Almost surely, 2^66150816 is an apocalyptic number.

It is an amenable number.

66150816 is an abundant number, since it is smaller than the sum of its proper divisors (107495328).

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

66150816 is a wasteful number, since it uses less digits than its factorization.

66150816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689084 (or 689076 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 66150816 is about 8133.3151912366. The cubic root of 66150816 is about 404.4315879216.

It can be divided in two parts, 66150 and 816, that added together give a palindrome (66966).

The spelling of 66150816 in words is "sixty-six million, one hundred fifty thousand, eight hundred sixteen".