621662746 has 8 divisors (see below), whose sum is σ = 955238004. Its totient is φ = 303250080.

The previous prime is 621662711. The next prime is 621662753. The reversal of 621662746 is 647266126.

It can be written as a sum of positive squares in 2 ways, for example, as 613107121 + 8555625 = 24761^2 + 2925^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 621662699 and 621662708.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3790545 + ... + 3790708.

Almost surely, 2^621662746 is an apocalyptic number.

621662746 is a deficient number, since it is larger than the sum of its proper divisors (333575258).

621662746 is a wasteful number, since it uses less digits than its factorization.

621662746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7581296.

The product of its digits is 145152, while the sum is 40.

The square root of 621662746 is about 24933.1655832147. The cubic root of 621662746 is about 853.4634903122.

The spelling of 621662746 in words is "six hundred twenty-one million, six hundred sixty-two thousand, seven hundred forty-six".