66747885770 has 32 divisors (see below), whose sum is σ = 125669335680. Its totient is φ = 25477334080.

The previous prime is 66747885751. The next prime is 66747885773. The reversal of 66747885770 is 7758874766.

It is a junction number, because it is equal to n+sod(n) for n = 66747885697 and 66747885706.

It is not an unprimeable number, because it can be changed into a prime (66747885773) 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, 249941 + ... + 442680.

It is an arithmetic number, because the mean of its divisors is an integer number (3927166740).

Almost surely, 2^66747885770 is an apocalyptic number.

66747885770 is a deficient number, since it is larger than the sum of its proper divisors (58921449910).

66747885770 is a wasteful number, since it uses less digits than its factorization.

66747885770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693070.

The product of its (nonzero) digits is 110638080, while the sum is 65.

The spelling of 66747885770 in words is "sixty-six billion, seven hundred forty-seven million, eight hundred eighty-five thousand, seven hundred seventy".