662770643 has 4 divisors (see below), whose sum is σ = 662822160. Its totient is φ = 662719128.

The previous prime is 662770613. The next prime is 662770663. The reversal of 662770643 is 346077266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 346077266 = 2 ⋅173038633.

It is a cyclic number.

It is not a de Polignac number, because 662770643 - 2⁸ = 662770387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 662770643.

It is not an unprimeable number, because it can be changed into a prime (662770613) 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, 11621 + ... + 38217.

It is an arithmetic number, because the mean of its divisors is an integer number (165705540).

Almost surely, 2^662770643 is an apocalyptic number.

662770643 is a deficient number, since it is larger than the sum of its proper divisors (51517).

662770643 is a wasteful number, since it uses less digits than its factorization.

662770643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51516.

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 662770643 is about 25744.3322500313. The cubic root of 662770643 is about 871.8753938291.

The spelling of 662770643 in words is "six hundred sixty-two million, seven hundred seventy thousand, six hundred forty-three".