620665722 has 48 divisors (see below), whose sum is σ = 1393498080. Its totient is φ = 199526496.

The previous prime is 620665711. The next prime is 620665739. The reversal of 620665722 is 227566026.

620665722 is a `hidden beast` number, since 6 + 20 + 66 + 572 + 2 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 50773 + ... + 61799.

It is an arithmetic number, because the mean of its divisors is an integer number (29031210).

Almost surely, 2^620665722 is an apocalyptic number.

620665722 is an abundant number, since it is smaller than the sum of its proper divisors (772832358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620665722 is a wasteful number, since it uses less digits than its factorization.

620665722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11147 (or 11144 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 620665722 is about 24913.1636288931. The cubic root of 620665722 is about 853.0069840052.

The spelling of 620665722 in words is "six hundred twenty million, six hundred sixty-five thousand, seven hundred twenty-two".