626532661 has 16 divisors (see below), whose sum is σ = 664373248. Its totient is φ = 589906800.

The previous prime is 626532659. The next prime is 626532667. The reversal of 626532661 is 166235626.

It is a cyclic number.

It is not a de Polignac number, because 626532661 - 2¹ = 626532659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 626532661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626532667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408466 + ... + 409996.

It is an arithmetic number, because the mean of its divisors is an integer number (41523328).

Almost surely, 2^626532661 is an apocalyptic number.

It is an amenable number.

626532661 is a deficient number, since it is larger than the sum of its proper divisors (37840587).

626532661 is a wasteful number, since it uses less digits than its factorization.

626532661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its digits is 77760, while the sum is 37.

The square root of 626532661 is about 25030.6344506087. The cubic root of 626532661 is about 855.6862864197.

The spelling of 626532661 in words is "six hundred twenty-six million, five hundred thirty-two thousand, six hundred sixty-one".