621667068 has 24 divisors (see below), whose sum is σ = 1582425600. Its totient is φ = 188383920.

The previous prime is 621667063. The next prime is 621667097. The reversal of 621667068 is 860766126.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621667063) 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, 2354668 + ... + 2354931.

It is an arithmetic number, because the mean of its divisors is an integer number (65934400).

Almost surely, 2^621667068 is an apocalyptic number.

It is an amenable number.

621667068 is an abundant number, since it is smaller than the sum of its proper divisors (960758532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621667068 is a wasteful number, since it uses less digits than its factorization.

621667068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709617 (or 4709615 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 621667068 is about 24933.2522547701. The cubic root of 621667068 is about 853.4654681588.

The spelling of 621667068 in words is "six hundred twenty-one million, six hundred sixty-seven thousand, sixty-eight".