66004642555466 has 8 divisors (see below), whose sum is σ = 99012906321444. Its totient is φ = 33000340448320.

The previous prime is 66004642555459. The next prime is 66004642555493. The reversal of 66004642555466 is 66455524640066.

It can be written as a sum of positive squares in 2 ways, for example, as 58680425899225 + 7324216656241 = 7660315^2 + 2706329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66004642555466² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990373055 + ... + 990439698.

Almost surely, 2^{66004642555466} is an apocalyptic number.

66004642555466 is a deficient number, since it is larger than the sum of its proper divisors (33008263765978).

66004642555466 is a wasteful number, since it uses less digits than its factorization.

66004642555466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980829416.

The product of its (nonzero) digits is 124416000, while the sum is 59.

The spelling of 66004642555466 in words is "sixty-six trillion, four billion, six hundred forty-two million, five hundred fifty-five thousand, four hundred sixty-six".