66486770 has 16 divisors (see below), whose sum is σ = 136772928. Its totient is φ = 22795440.

The previous prime is 66486731. The next prime is 66486773. The reversal of 66486770 is 7768466.

It is not an unprimeable number, because it can be changed into a prime (66486773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474836 + ... + 474975.

It is an arithmetic number, because the mean of its divisors is an integer number (8548308).

Almost surely, 2^66486770 is an apocalyptic number.

66486770 is an abundant number, since it is smaller than the sum of its proper divisors (70286158).

66486770 is a wasteful number, since it uses less digits than its factorization.

66486770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949825.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 66486770 is about 8153.9419914542. The cubic root of 66486770 is about 405.1150818619.

The spelling of 66486770 in words is "sixty-six million, four hundred eighty-six thousand, seven hundred seventy".