621980678 has 16 divisors (see below), whose sum is σ = 1018978704. Its totient is φ = 282387360.

The previous prime is 621980677. The next prime is 621980687. The reversal of 621980678 is 876089126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621980677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3176 + ... + 35412.

It is an arithmetic number, because the mean of its divisors is an integer number (63686169).

Almost surely, 2^621980678 is an apocalyptic number.

621980678 is a deficient number, since it is larger than the sum of its proper divisors (396998026).

621980678 is a wasteful number, since it uses less digits than its factorization.

621980678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33127.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 621980678 is about 24939.5404528632. The cubic root of 621980678 is about 853.6089588492.

The spelling of 621980678 in words is "six hundred twenty-one million, nine hundred eighty thousand, six hundred seventy-eight".