646332770267 has 4 divisors (see below), whose sum is σ = 646497277320. Its totient is φ = 646168263216.

The previous prime is 646332770263. The next prime is 646332770297. The reversal of 646332770267 is 762077233646.

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

It is a cyclic number.

It is not a de Polignac number, because 646332770267 - 2² = 646332770263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646332770261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82247633 + ... + 82255490.

It is an arithmetic number, because the mean of its divisors is an integer number (161624319330).

Almost surely, 2^646332770267 is an apocalyptic number.

646332770267 is a deficient number, since it is larger than the sum of its proper divisors (164507053).

646332770267 is a wasteful number, since it uses less digits than its factorization.

646332770267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164507052.

The product of its (nonzero) digits is 10668672, while the sum is 53.

The spelling of 646332770267 in words is "six hundred forty-six billion, three hundred thirty-two million, seven hundred seventy thousand, two hundred sixty-seven".