646662262 has 4 divisors (see below), whose sum is σ = 969993396. Its totient is φ = 323331130.

The previous prime is 646662259. The next prime is 646662293. The reversal of 646662262 is 262266646.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161665564 + ... + 161665567.

It is an arithmetic number, because the mean of its divisors is an integer number (242498349).

Almost surely, 2^646662262 is an apocalyptic number.

646662262 is a deficient number, since it is larger than the sum of its proper divisors (323331134).

646662262 is a wasteful number, since it uses less digits than its factorization.

646662262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323331133.

The product of its digits is 248832, while the sum is 40.

The square root of 646662262 is about 25429.5548918969. The cubic root of 646662262 is about 864.7538529132.

The spelling of 646662262 in words is "six hundred forty-six million, six hundred sixty-two thousand, two hundred sixty-two".