546520666 has 4 divisors (see below), whose sum is σ = 819781002. Its totient is φ = 273260332.

The previous prime is 546520661. The next prime is 546520679. The reversal of 546520666 is 666025645.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666025645 = 5 ⋅133205129.

It can be written as a sum of positive squares in only one way, i.e., 415303641 + 131217025 = 20379^2 + 11455^2 .

It is not an unprimeable number, because it can be changed into a prime (546520661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136630165 + ... + 136630168.

Almost surely, 2^546520666 is an apocalyptic number.

546520666 is a deficient number, since it is larger than the sum of its proper divisors (273260336).

546520666 is a wasteful number, since it uses less digits than its factorization.

546520666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273260335.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 546520666 is about 23377.7814601814. The cubic root of 546520666 is about 817.5899222441.

The spelling of 546520666 in words is "five hundred forty-six million, five hundred twenty thousand, six hundred sixty-six".