2646666442 has 32 divisors (see below), whose sum is σ = 4740809472. Its totient is φ = 1083502464.

The previous prime is 2646666439. The next prime is 2646666457. The reversal of 2646666442 is 2446666462.

It is a happy number.

2646666442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 2646666392 and 2646666401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251478 + ... + 261790.

It is an arithmetic number, because the mean of its divisors is an integer number (148150296).

Almost surely, 2^2646666442 is an apocalyptic number.

2646666442 is a deficient number, since it is larger than the sum of its proper divisors (2094143030).

2646666442 is a wasteful number, since it uses less digits than its factorization.

2646666442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11142.

The product of its digits is 1990656, while the sum is 46.

The square root of 2646666442 is about 51445.7621383919. The cubic root of 2646666442 is about 1383.2469998797.

The spelling of 2646666442 in words is "two billion, six hundred forty-six million, six hundred sixty-six thousand, four hundred forty-two".