666103306122556 has 24 divisors (see below), whose sum is σ = 1173759853964544. Its totient is φ = 330749228881920.

The previous prime is 666103306122511. The next prime is 666103306122587. The reversal of 666103306122556 is 655221603301666.

It is a super-2 number, since 2×666103306122556² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734675925 + ... + 735582028.

It is an arithmetic number, because the mean of its divisors is an integer number (48906660581856).

Almost surely, 2^{666103306122556} is an apocalyptic number.

It is an amenable number.

666103306122556 is a deficient number, since it is larger than the sum of its proper divisors (507656547841988).

666103306122556 is a wasteful number, since it uses less digits than its factorization.

666103306122556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470258741 (or 1470258739 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 666103306122556 in words is "six hundred sixty-six trillion, one hundred three billion, three hundred six million, one hundred twenty-two thousand, five hundred fifty-six".