5212406661 has 24 divisors (see below), whose sum is σ = 8730426432. Its totient is φ = 2707742400.

The previous prime is 5212406603. The next prime is 5212406699. The reversal of 5212406661 is 1666042125.

It is not a de Polignac number, because 5212406661 - 2¹³ = 5212398469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5212402661) 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, 1023120 + ... + 1028201.

It is an arithmetic number, because the mean of its divisors is an integer number (363767768).

Almost surely, 2^5212406661 is an apocalyptic number.

It is an amenable number.

5212406661 is a deficient number, since it is larger than the sum of its proper divisors (3518019771).

5212406661 is a wasteful number, since it uses less digits than its factorization.

5212406661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051353 (or 2051342 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 5212406661 is about 72196.9989750267. The cubic root of 5212406661 is about 1733.8549541501.

Adding to 5212406661 its reverse (1666042125), we get a palindrome (6878448786).

The spelling of 5212406661 in words is "five billion, two hundred twelve million, four hundred six thousand, six hundred sixty-one".