620066669 has 4 divisors (see below), whose sum is σ = 620204640. Its totient is φ = 619928700.

The previous prime is 620066651. The next prime is 620066677. The reversal of 620066669 is 966660026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 966660026 = 2 ⋅483330013.

It is a cyclic number.

It is not a de Polignac number, because 620066669 - 2⁸ = 620066413 is a prime.

It is a super-2 number, since 2×620066669² = 768965348009511122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620066639) 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 3 ways as a sum of consecutive naturals, for example, 62009 + ... + 71310.

It is an arithmetic number, because the mean of its divisors is an integer number (155051160).

Almost surely, 2^620066669 is an apocalyptic number.

It is an amenable number.

620066669 is a deficient number, since it is larger than the sum of its proper divisors (137971).

620066669 is a wasteful number, since it uses less digits than its factorization.

620066669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137970.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 620066669 is about 24901.1379057263. The cubic root of 620066669 is about 852.7324610945.

The spelling of 620066669 in words is "six hundred twenty million, sixty-six thousand, six hundred sixty-nine".