648932066 has 4 divisors (see below), whose sum is σ = 973398102. Its totient is φ = 324466032.

The previous prime is 648932059. The next prime is 648932077. The reversal of 648932066 is 660239846.

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., 630261025 + 18671041 = 25105^2 + 4321^2 .

It is a super-2 number, since 2×648932066² = 842225652566056712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162233015 + ... + 162233018.

Almost surely, 2^648932066 is an apocalyptic number.

648932066 is a deficient number, since it is larger than the sum of its proper divisors (324466036).

648932066 is a wasteful number, since it uses less digits than its factorization.

648932066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324466035.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 648932066 is about 25474.1450494418. The cubic root of 648932066 is about 865.7644421168.

The spelling of 648932066 in words is "six hundred forty-eight million, nine hundred thirty-two thousand, sixty-six".