6621742043 has 16 divisors (see below), whose sum is σ = 7814780160. Its totient is φ = 5492896416.

The previous prime is 6621742013. The next prime is 6621742081. The reversal of 6621742043 is 3402471266.

It is not a de Polignac number, because 6621742043 - 2⁶ = 6621741979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6621741994 and 6621742012.

It is not an unprimeable number, because it can be changed into a prime (6621742013) 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, 68105 + ... + 133722.

It is an arithmetic number, because the mean of its divisors is an integer number (488423760).

Almost surely, 2^6621742043 is an apocalyptic number.

6621742043 is a deficient number, since it is larger than the sum of its proper divisors (1193038117).

6621742043 is a wasteful number, since it uses less digits than its factorization.

6621742043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201986.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 6621742043 is about 81374.0870486422. The cubic root of 6621742043 is about 1877.8349570082.

The spelling of 6621742043 in words is "six billion, six hundred twenty-one million, seven hundred forty-two thousand, forty-three".