66195240 has 64 divisors (see below), whose sum is σ = 209044800. Its totient is φ = 16722432.

The previous prime is 66195203. The next prime is 66195277. The reversal of 66195240 is 4259166.

66195240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66195203) and next prime (66195277).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12237 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (3266325).

Almost surely, 2^66195240 is an apocalyptic number.

66195240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66195240 is an abundant number, since it is smaller than the sum of its proper divisors (142849560).

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

66195240 is a wasteful number, since it uses less digits than its factorization.

66195240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29066 (or 29062 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66195240 is about 8136.0457225854. The cubic root of 66195240 is about 404.5221005291.

The spelling of 66195240 in words is "sixty-six million, one hundred ninety-five thousand, two hundred forty".