1662222661 has 8 divisors (see below), whose sum is σ = 1814098464. Its totient is φ = 1510474320.

The previous prime is 1662222607. The next prime is 1662222671.

1662222661 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1662222661 - 2¹⁷ = 1662091589 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 (1662222671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3490 + ... + 57763.

It is an arithmetic number, because the mean of its divisors is an integer number (226762308).

Almost surely, 2^1662222661 is an apocalyptic number.

1662222661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1662222661 is a deficient number, since it is larger than the sum of its proper divisors (151875803).

1662222661 is a wasteful number, since it uses less digits than its factorization.

1662222661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63731.

The product of its digits is 20736, while the sum is 34.

The square root of 1662222661 is about 40770.3649848760. The cubic root of 1662222661 is about 1184.5763732301.

The spelling of 1662222661 in words is "one billion, six hundred sixty-two million, two hundred twenty-two thousand, six hundred sixty-one".