620263666 has 24 divisors (see below), whose sum is σ = 1082830140. Its totient is φ = 265351680.

The previous prime is 620263639. The next prime is 620263673. The reversal of 620263666 is 666362026.

It can be written as a sum of positive squares in 2 ways, for example, as 476767225 + 143496441 = 21835^2 + 11979^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71271 + ... + 79498.

Almost surely, 2^620263666 is an apocalyptic number.

620263666 is a deficient number, since it is larger than the sum of its proper divisors (462566474).

620263666 is a wasteful number, since it uses less digits than its factorization.

620263666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150810 (or 150799 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 620263666 is about 24905.0931738871. The cubic root of 620263666 is about 852.8227567343.

The spelling of 620263666 in words is "six hundred twenty million, two hundred sixty-three thousand, six hundred sixty-six".