1622666047 has 4 divisors (see below), whose sum is σ = 1622792800. Its totient is φ = 1622539296.

The previous prime is 1622666033. The next prime is 1622666069. The reversal of 1622666047 is 7406662261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1622666047 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 (1622666147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41703 + ... + 70600.

It is an arithmetic number, because the mean of its divisors is an integer number (405698200).

Almost surely, 2^1622666047 is an apocalyptic number.

1622666047 is a deficient number, since it is larger than the sum of its proper divisors (126753).

1622666047 is a wasteful number, since it uses less digits than its factorization.

1622666047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126752.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 1622666047 is about 40282.3292151782. The cubic root of 1622666047 is about 1175.1042121543.

The spelling of 1622666047 in words is "one billion, six hundred twenty-two million, six hundred sixty-six thousand, forty-seven".