624246661 has 2 divisors, whose sum is σ = 624246662. Its totient is φ = 624246660.

The previous prime is 624246643. The next prime is 624246671. The reversal of 624246661 is 166642426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591413761 + 32832900 = 24319^2 + 5730^2 .

It is a cyclic number.

It is not a de Polignac number, because 624246661 - 2⁵ = 624246629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 624246661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624246671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312123330 + 312123331.

It is an arithmetic number, because the mean of its divisors is an integer number (312123331).

Almost surely, 2^624246661 is an apocalyptic number.

It is an amenable number.

624246661 is a deficient number, since it is larger than the sum of its proper divisors (1).

624246661 is an equidigital number, since it uses as much as digits as its factorization.

624246661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 624246661 is about 24984.9286771045. The cubic root of 624246661 is about 854.6443174751.

The spelling of 624246661 in words is "six hundred twenty-four million, two hundred forty-six thousand, six hundred sixty-one".