620780667 has 8 divisors (see below), whose sum is σ = 891377424. Its totient is φ = 382018848.

The previous prime is 620780663. The next prime is 620780689. The reversal of 620780667 is 766087026.

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

It is not a de Polignac number, because 620780667 - 2² = 620780663 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (620780663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7958688 + ... + 7958765.

It is an arithmetic number, because the mean of its divisors is an integer number (111422178).

Almost surely, 2^620780667 is an apocalyptic number.

620780667 is a deficient number, since it is larger than the sum of its proper divisors (270596757).

620780667 is a wasteful number, since it uses less digits than its factorization.

620780667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15917469.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 620780667 is about 24915.4704350530. The cubic root of 620780667 is about 853.0596386695.

The spelling of 620780667 in words is "six hundred twenty million, seven hundred eighty thousand, six hundred sixty-seven".