545378666 has 32 divisors (see below), whose sum is σ = 999060480. Its totient is φ = 217956096.

The previous prime is 545378653. The next prime is 545378671. The reversal of 545378666 is 666873545.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15431 + ... + 36453.

It is an arithmetic number, because the mean of its divisors is an integer number (31220640).

Almost surely, 2^545378666 is an apocalyptic number.

545378666 is a deficient number, since it is larger than the sum of its proper divisors (453681814).

545378666 is a wasteful number, since it uses less digits than its factorization.

545378666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21158.

The product of its digits is 3628800, while the sum is 50.

The square root of 545378666 is about 23353.3437862761. The cubic root of 545378666 is about 817.0200512740.

The spelling of 545378666 in words is "five hundred forty-five million, three hundred seventy-eight thousand, six hundred sixty-six".