2661229946 has 16 divisors (see below), whose sum is σ = 4449116160. Its totient is φ = 1186430400.

The previous prime is 2661229943. The next prime is 2661229951. The reversal of 2661229946 is 6499221662.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661229946.

It is not an unprimeable number, because it can be changed into a prime (2661229943) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2059130 + ... + 2060421.

It is an arithmetic number, because the mean of its divisors is an integer number (278069760).

Almost surely, 2^2661229946 is an apocalyptic number.

2661229946 is a deficient number, since it is larger than the sum of its proper divisors (1787886214).

2661229946 is a wasteful number, since it uses less digits than its factorization.

2661229946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119589.

The product of its digits is 559872, while the sum is 47.

The square root of 2661229946 is about 51587.1102699114. The cubic root of 2661229946 is about 1385.7795046348.

The spelling of 2661229946 in words is "two billion, six hundred sixty-one million, two hundred twenty-nine thousand, nine hundred forty-six".