66888370 has 32 divisors (see below), whose sum is σ = 133031808. Its totient is φ = 24085248.

The previous prime is 66888337. The next prime is 66888377. The reversal of 66888370 is 7388866.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 66888370.

It is not an unprimeable number, because it can be changed into a prime (66888377) 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, 4644 + ... + 12463.

It is an arithmetic number, because the mean of its divisors is an integer number (4157244).

Almost surely, 2^66888370 is an apocalyptic number.

66888370 is a deficient number, since it is larger than the sum of its proper divisors (66143438).

66888370 is a wasteful number, since it uses less digits than its factorization.

66888370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17154.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 66888370 is about 8178.5310416969. The cubic root of 66888370 is about 405.9291171845.

The spelling of 66888370 in words is "sixty-six million, eight hundred eighty-eight thousand, three hundred seventy".