627039661 has 8 divisors (see below), whose sum is σ = 639901944. Its totient is φ = 614215680.

The previous prime is 627039659. The next prime is 627039671. The reversal of 627039661 is 166930726.

It can be written as a sum of positive squares in 4 ways, for example, as 363626761 + 263412900 = 19069^2 + 16230^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 627039661 - 2¹ = 627039659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (627039641) 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, 24745 + ... + 43201.

It is an arithmetic number, because the mean of its divisors is an integer number (79987743).

Almost surely, 2^627039661 is an apocalyptic number.

It is an amenable number.

627039661 is a deficient number, since it is larger than the sum of its proper divisors (12862283).

627039661 is a wasteful number, since it uses less digits than its factorization.

627039661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19151.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 627039661 is about 25040.7599924603. The cubic root of 627039661 is about 855.9170357513.

The spelling of 627039661 in words is "six hundred twenty-seven million, thirty-nine thousand, six hundred sixty-one".