620766653 has 8 divisors (see below), whose sum is σ = 668752896. Its totient is φ = 572814000.

The previous prime is 620766637. The next prime is 620766659. The reversal of 620766653 is 356667026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620766653 - 2⁴ = 620766637 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 620766653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620766659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40628 + ... + 53778.

It is an arithmetic number, because the mean of its divisors is an integer number (83594112).

Almost surely, 2^620766653 is an apocalyptic number.

It is an amenable number.

620766653 is a deficient number, since it is larger than the sum of its proper divisors (47986243).

620766653 is a wasteful number, since it uses less digits than its factorization.

620766653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16795.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 620766653 is about 24915.1892025728. The cubic root of 620766653 is about 853.0532194040.

The spelling of 620766653 in words is "six hundred twenty million, seven hundred sixty-six thousand, six hundred fifty-three".