30666654261 has 24 divisors (see below), whose sum is σ = 44826926040. Its totient is φ = 20199860736.

The previous prime is 30666654251. The next prime is 30666654269. The reversal of 30666654261 is 16245666603.

It can be written as a sum of positive squares in 4 ways, for example, as 1807100100 + 28859554161 = 42510^2 + 169881^2 .

It is not a de Polignac number, because 30666654261 - 2⁹ = 30666653749 is a prime.

It is a super-2 number, since 2×30666654261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30666654269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1134475 + ... + 1161191.

It is an arithmetic number, because the mean of its divisors is an integer number (1867788585).

Almost surely, 2^30666654261 is an apocalyptic number.

It is an amenable number.

30666654261 is a deficient number, since it is larger than the sum of its proper divisors (14160271779).

30666654261 is a wasteful number, since it uses less digits than its factorization.

30666654261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28245 (or 28242 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

It can be divided in two parts, 306666542 and 61, that added together give a palindrome (306666603).

The spelling of 30666654261 in words is "thirty billion, six hundred sixty-six million, six hundred fifty-four thousand, two hundred sixty-one".