30661242566 has 4 divisors (see below), whose sum is σ = 45991863852. Its totient is φ = 15330621282.

The previous prime is 30661242539. The next prime is 30661242613. The reversal of 30661242566 is 66524216603.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66524216603 = 13 ⋅5117247431.

It is a super-2 number, since 2×30661242566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7665310640 + ... + 7665310643.

It is an arithmetic number, because the mean of its divisors is an integer number (11497965963).

Almost surely, 2^30661242566 is an apocalyptic number.

30661242566 is a deficient number, since it is larger than the sum of its proper divisors (15330621286).

30661242566 is a wasteful number, since it uses less digits than its factorization.

30661242566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15330621285.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 30661242566 in words is "thirty billion, six hundred sixty-one million, two hundred forty-two thousand, five hundred sixty-six".