2660378946 has 32 divisors (see below), whose sum is σ = 5409244800. Its totient is φ = 872108160.

The previous prime is 2660378899. The next prime is 2660378947. The reversal of 2660378946 is 6498730662.

It is a happy number.

It is a super-2 number, since 2×2660378946² = 14155232272640141832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2660378947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166600 + ... + 181868.

It is an arithmetic number, because the mean of its divisors is an integer number (169038900).

Almost surely, 2^2660378946 is an apocalyptic number.

2660378946 is an abundant number, since it is smaller than the sum of its proper divisors (2748865854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2660378946 is a wasteful number, since it uses less digits than its factorization.

2660378946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15754.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The square root of 2660378946 is about 51578.8614259757. The cubic root of 2660378946 is about 1385.6317754383.

The spelling of 2660378946 in words is "two billion, six hundred sixty million, three hundred seventy-eight thousand, nine hundred forty-six".