2661212006 has 4 divisors (see below), whose sum is σ = 3991818012. Its totient is φ = 1330606002.

The previous prime is 2661212003. The next prime is 2661212009. The reversal of 2661212006 is 6002121662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6002121662 = 2 ⋅3001060831.

It is an interprime number because it is at equal distance from previous prime (2661212003) and next prime (2661212009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661212003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665303000 + ... + 665303003.

It is an arithmetic number, because the mean of its divisors is an integer number (997954503).

Almost surely, 2^2661212006 is an apocalyptic number.

2661212006 is a deficient number, since it is larger than the sum of its proper divisors (1330606006).

2661212006 is a wasteful number, since it uses less digits than its factorization.

2661212006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330606005.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2661212006 is about 51586.9363889735. The cubic root of 2661212006 is about 1385.7763906686.

Adding to 2661212006 its reverse (6002121662), we get a palindrome (8663333668).

The spelling of 2661212006 in words is "two billion, six hundred sixty-one million, two hundred twelve thousand, six".