662044643 has 4 divisors (see below), whose sum is σ = 712971168. Its totient is φ = 611118120.

The previous prime is 662044639. The next prime is 662044657. The reversal of 662044643 is 346440266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346440266 = 2 ⋅173220133.

It is a cyclic number.

It is not a de Polignac number, because 662044643 - 2² = 662044639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (662044043) 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, 25463243 + ... + 25463268.

It is an arithmetic number, because the mean of its divisors is an integer number (178242792).

Almost surely, 2^662044643 is an apocalyptic number.

662044643 is a deficient number, since it is larger than the sum of its proper divisors (50926525).

662044643 is a wasteful number, since it uses less digits than its factorization.

662044643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50926524.

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 662044643 is about 25730.2281956457. The cubic root of 662044643 is about 871.5569262937.

The spelling of 662044643 in words is "six hundred sixty-two million, forty-four thousand, six hundred forty-three".