621006068 has 6 divisors (see below), whose sum is σ = 1086760626. Its totient is φ = 310503032.

The previous prime is 621006041. The next prime is 621006079. The reversal of 621006068 is 860600126.

It can be written as a sum of positive squares in only one way, i.e., 337016164 + 283989904 = 18358^2 + 16852^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 621006068.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77625755 + ... + 77625762.

It is an arithmetic number, because the mean of its divisors is an integer number (181126771).

Almost surely, 2^621006068 is an apocalyptic number.

It is an amenable number.

621006068 is a deficient number, since it is larger than the sum of its proper divisors (465754558).

621006068 is a wasteful number, since it uses less digits than its factorization.

621006068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155251521 (or 155251519 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 621006068 is about 24919.9933386829. The cubic root of 621006068 is about 853.1628727846.

The spelling of 621006068 in words is "six hundred twenty-one million, six thousand, sixty-eight".