66525330 has 32 divisors (see below), whose sum is σ = 161590464. Its totient is φ = 17525696.

The previous prime is 66525323. The next prime is 66525341. The reversal of 66525330 is 3352566.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10869 + ... + 15848.

It is an arithmetic number, because the mean of its divisors is an integer number (5049702).

Almost surely, 2^66525330 is an apocalyptic number.

66525330 is an abundant number, since it is smaller than the sum of its proper divisors (95065134).

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

66525330 is a wasteful number, since it uses less digits than its factorization.

66525330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26810.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 66525330 is about 8156.3061492320. The cubic root of 66525330 is about 405.1933842501.

Adding to 66525330 its reverse (3352566), we get a palindrome (69877896).

The spelling of 66525330 in words is "sixty-six million, five hundred twenty-five thousand, three hundred thirty".