66210477401266 has 16 divisors (see below), whose sum is σ = 108346014883008. Its totient is φ = 30095227846800.

The previous prime is 66210477401239. The next prime is 66210477401269.

66210477401266 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (66210477401269) 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, 20656470 + ... + 23645521.

It is an arithmetic number, because the mean of its divisors is an integer number (6771625930188).

Almost surely, 2^{66210477401266} is an apocalyptic number.

66210477401266 is a deficient number, since it is larger than the sum of its proper divisors (42135537481742).

66210477401266 is a wasteful number, since it uses less digits than its factorization.

66210477401266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44369937.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 66210477401266 in words is "sixty-six trillion, two hundred ten billion, four hundred seventy-seven million, four hundred one thousand, two hundred sixty-six".