1662612361 has 8 divisors (see below), whose sum is σ = 1706531400. Its totient is φ = 1618853760.

The previous prime is 1662612313. The next prime is 1662612379. The reversal of 1662612361 is 1632162661.

It can be written as a sum of positive squares in 4 ways, for example, as 137241225 + 1525371136 = 11715^2 + 39056^2 .

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 1662612361 - 2²¹ = 1660515209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662612761) 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, 18966 + ... + 60703.

It is an arithmetic number, because the mean of its divisors is an integer number (213316425).

Almost surely, 2^1662612361 is an apocalyptic number.

It is an amenable number.

1662612361 is a deficient number, since it is larger than the sum of its proper divisors (43919039).

1662612361 is an equidigital number, since it uses as much as digits as its factorization.

1662612361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80219.

The product of its digits is 15552, while the sum is 34.

The square root of 1662612361 is about 40775.1439114566. The cubic root of 1662612361 is about 1184.6689387154.

The spelling of 1662612361 in words is "one billion, six hundred sixty-two million, six hundred twelve thousand, three hundred sixty-one".