2066378 has 4 divisors (see below), whose sum is σ = 3099570. Its totient is φ = 1033188.

The previous prime is 2066329. The next prime is 2066399. The reversal of 2066378 is 8736602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1968409 + 97969 = 1403^2 + 313^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 516593 + ... + 516596.

2^2066378 is an apocalyptic number.

2066378 is a deficient number, since it is larger than the sum of its proper divisors (1033192).

2066378 is a wasteful number, since it uses less digits than its factorization.

2066378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033191.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 2066378 is about 1437.4901738795. The cubic root of 2066378 is about 127.3708136577.

The spelling of 2066378 in words is "two million, sixty-six thousand, three hundred seventy-eight".