620668785 has 16 divisors (see below), whose sum is σ = 1083349440. Its totient is φ = 300930240.

The previous prime is 620668757. The next prime is 620668799. The reversal of 620668785 is 587866026.

It is not a de Polignac number, because 620668785 - 2⁶ = 620668721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1880650 + ... + 1880979.

It is an arithmetic number, because the mean of its divisors is an integer number (67709340).

Almost surely, 2^620668785 is an apocalyptic number.

It is an amenable number.

620668785 is a deficient number, since it is larger than the sum of its proper divisors (462680655).

620668785 is a wasteful number, since it uses less digits than its factorization.

620668785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761648.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 620668785 is about 24913.2251023427. The cubic root of 620668785 is about 853.0083872061.

The spelling of 620668785 in words is "six hundred twenty million, six hundred sixty-eight thousand, seven hundred eighty-five".