6619656742 has 16 divisors (see below), whose sum is σ = 10113357600. Its totient is φ = 3248945280.

The previous prime is 6619656697. The next prime is 6619656751. The reversal of 6619656742 is 2476569166.

It is a happy number.

It is a super-3 number, since 3×6619656742³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6619656742.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 69267 + ... + 134302.

It is an arithmetic number, because the mean of its divisors is an integer number (632084850).

Almost surely, 2^6619656742 is an apocalyptic number.

6619656742 is a deficient number, since it is larger than the sum of its proper divisors (3493700858).

6619656742 is a wasteful number, since it uses less digits than its factorization.

6619656742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203871.

The product of its digits is 3265920, while the sum is 52.

The square root of 6619656742 is about 81361.2729865997. The cubic root of 6619656742 is about 1877.6378154194.

The spelling of 6619656742 in words is "six billion, six hundred nineteen million, six hundred fifty-six thousand, seven hundred forty-two".