2661439652 has 12 divisors (see below), whose sum is σ = 4807762176. Its totient is φ = 1287793320.

The previous prime is 2661439631. The next prime is 2661439657. The reversal of 2661439652 is 2569341662.

It is a super-2 number, since 2×2661439652² = 14166522042475762208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661439657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10731488 + ... + 10731735.

It is an arithmetic number, because the mean of its divisors is an integer number (400646848).

Almost surely, 2^2661439652 is an apocalyptic number.

It is an amenable number.

2661439652 is a deficient number, since it is larger than the sum of its proper divisors (2146322524).

2661439652 is a wasteful number, since it uses less digits than its factorization.

2661439652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21463258 (or 21463256 counting only the distinct ones).

The product of its digits is 466560, while the sum is 44.

The square root of 2661439652 is about 51589.1427724865. The cubic root of 2661439652 is about 1385.8159036745.

It can be divided in two parts, 26614 and 39652, that added together give a palindrome (66266).

The spelling of 2661439652 in words is "two billion, six hundred sixty-one million, four hundred thirty-nine thousand, six hundred fifty-two".