66675320 has 32 divisors (see below), whose sum is σ = 150400800. Its totient is φ = 26602368.

The previous prime is 66675317. The next prime is 66675331. The reversal of 66675320 is 2357666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15662 + ... + 19458.

It is an arithmetic number, because the mean of its divisors is an integer number (4700025).

Almost surely, 2^66675320 is an apocalyptic number.

It is an amenable number.

66675320 is an abundant number, since it is smaller than the sum of its proper divisors (83725480).

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

66675320 is a wasteful number, since it uses less digits than its factorization.

66675320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247 (or 4243 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 66675320 is about 8165.4956983639. The cubic root of 66675320 is about 405.4976760530.

The spelling of 66675320 in words is "sixty-six million, six hundred seventy-five thousand, three hundred twenty".