620669686 has 32 divisors (see below), whose sum is σ = 1170247680. Its totient is φ = 240312096.

The previous prime is 620669683. The next prime is 620669689. The reversal of 620669686 is 686966026.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (620669683) and next prime (620669689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620669683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27726 + ... + 44833.

It is an arithmetic number, because the mean of its divisors is an integer number (36570240).

Almost surely, 2^620669686 is an apocalyptic number.

620669686 is a deficient number, since it is larger than the sum of its proper divisors (549577994).

620669686 is a wasteful number, since it uses less digits than its factorization.

620669686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72628.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 620669686 is about 24913.2431851014. The cubic root of 620669686 is about 853.0087999653.

The spelling of 620669686 in words is "six hundred twenty million, six hundred sixty-nine thousand, six hundred eighty-six".