626566961 has 8 divisors (see below), whose sum is σ = 652730400. Its totient is φ = 600921760.

The previous prime is 626566949. The next prime is 626566979. The reversal of 626566961 is 169665626.

It is a happy number.

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 626566961 - 2¹⁰ = 626565937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626566921) 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, 127091 + ... + 131928.

It is an arithmetic number, because the mean of its divisors is an integer number (81591300).

Almost surely, 2^626566961 is an apocalyptic number.

It is an amenable number.

626566961 is a deficient number, since it is larger than the sum of its proper divisors (26163439).

626566961 is a wasteful number, since it uses less digits than its factorization.

626566961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259119.

The product of its digits is 699840, while the sum is 47.

The square root of 626566961 is about 25031.3196016510. The cubic root of 626566961 is about 855.7019011971.

The spelling of 626566961 in words is "six hundred twenty-six million, five hundred sixty-six thousand, nine hundred sixty-one".