666510397770 has 32 divisors (see below), whose sum is σ = 1828142805888. Its totient is φ = 152345233728.

The previous prime is 666510397759. The next prime is 666510397793. The reversal of 666510397770 is 77793015666.

666510397770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666510397770² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666510397770.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1586929309 + ... + 1586929728.

It is an arithmetic number, because the mean of its divisors is an integer number (57129462684).

Almost surely, 2^666510397770 is an apocalyptic number.

666510397770 is an abundant number, since it is smaller than the sum of its proper divisors (1161632408118).

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

666510397770 is a wasteful number, since it uses less digits than its factorization.

666510397770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173859054.

The product of its (nonzero) digits is 10001880, while the sum is 57.

The spelling of 666510397770 in words is "six hundred sixty-six billion, five hundred ten million, three hundred ninety-seven thousand, seven hundred seventy".