624292661 has 4 divisors (see below), whose sum is σ = 627527532. Its totient is φ = 621057792.

The previous prime is 624292639. The next prime is 624292699. The reversal of 624292661 is 166292426.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146870161 + 477422500 = 12119^2 + 21850^2 .

It is a cyclic number.

It is not a de Polignac number, because 624292661 - 2⁶ = 624292597 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 (624292621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617146 + ... + 1617531.

It is an arithmetic number, because the mean of its divisors is an integer number (156881883).

Almost surely, 2^624292661 is an apocalyptic number.

It is an amenable number.

624292661 is a deficient number, since it is larger than the sum of its proper divisors (3234871).

624292661 is a wasteful number, since it uses less digits than its factorization.

624292661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234870.

The product of its digits is 62208, while the sum is 38.

The square root of 624292661 is about 24985.8492151057. The cubic root of 624292661 is about 854.6653095366.

The spelling of 624292661 in words is "six hundred twenty-four million, two hundred ninety-two thousand, six hundred sixty-one".