620666893 has 8 divisors (see below), whose sum is σ = 773818560. Its totient is φ = 483636480.

The previous prime is 620666873. The next prime is 620666909. The reversal of 620666893 is 398666026.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620666893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620666803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4030228 + ... + 4030381.

It is an arithmetic number, because the mean of its divisors is an integer number (96727320).

Almost surely, 2^620666893 is an apocalyptic number.

It is an amenable number.

620666893 is a deficient number, since it is larger than the sum of its proper divisors (153151667).

620666893 is a wasteful number, since it uses less digits than its factorization.

620666893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060627.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 620666893 is about 24913.1871305138. The cubic root of 620666893 is about 853.0075204564.

The spelling of 620666893 in words is "six hundred twenty million, six hundred sixty-six thousand, eight hundred ninety-three".