668227619 has 16 divisors (see below), whose sum is σ = 719493120. Its totient is φ = 618347520.

The previous prime is 668227607. The next prime is 668227631. The reversal of 668227619 is 916722866.

It is an interprime number because it is at equal distance from previous prime (668227607) and next prime (668227631).

It is a cyclic number.

It is not a de Polignac number, because 668227619 - 2¹⁶ = 668162083 is a prime.

It is a super-2 number, since 2×668227619² = 893056301588818322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668227669) 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, 521822 + ... + 523100.

It is an arithmetic number, because the mean of its divisors is an integer number (44968320).

Almost surely, 2^668227619 is an apocalyptic number.

668227619 is a deficient number, since it is larger than the sum of its proper divisors (51265501).

668227619 is a wasteful number, since it uses less digits than its factorization.

668227619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790.

The product of its digits is 435456, while the sum is 47.

The square root of 668227619 is about 25850.0990133500. The cubic root of 668227619 is about 874.2617420243.

The spelling of 668227619 in words is "six hundred sixty-eight million, two hundred twenty-seven thousand, six hundred nineteen".