646333706 has 4 divisors (see below), whose sum is σ = 969500562. Its totient is φ = 323166852.

The previous prime is 646333687. The next prime is 646333711. The reversal of 646333706 is 607333646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 607333646 = 2 ⋅303666823.

It can be written as a sum of positive squares in only one way, i.e., 645414025 + 919681 = 25405^2 + 959^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 646333706.

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 as a sum of consecutive naturals, namely, 161583425 + ... + 161583428.

Almost surely, 2^646333706 is an apocalyptic number.

646333706 is a deficient number, since it is larger than the sum of its proper divisors (323166856).

646333706 is a wasteful number, since it uses less digits than its factorization.

646333706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323166855.

The product of its (nonzero) digits is 163296, while the sum is 38.

The square root of 646333706 is about 25423.0939501863. The cubic root of 646333706 is about 864.6073734624.

The spelling of 646333706 in words is "six hundred forty-six million, three hundred thirty-three thousand, seven hundred six".