1662342661 has 16 divisors (see below), whose sum is σ = 2017526400. Its totient is φ = 1337914368.

The previous prime is 1662342589. The next prime is 1662342673. The reversal of 1662342661 is 1662432661.

It is not a de Polignac number, because 1662342661 - 2²⁷ = 1528124933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1662342661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662342761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40276 + ... + 70333.

It is an arithmetic number, because the mean of its divisors is an integer number (126095400).

Almost surely, 2^1662342661 is an apocalyptic number.

It is an amenable number.

1662342661 is a deficient number, since it is larger than the sum of its proper divisors (355183739).

1662342661 is a wasteful number, since it uses less digits than its factorization.

1662342661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110748.

The product of its digits is 62208, while the sum is 37.

The square root of 1662342661 is about 40771.8366154874. The cubic root of 1662342661 is about 1184.6048783852.

Subtracting 1662342661 from its reverse (1662432661), we obtain a square (90000 = 300²).

The spelling of 1662342661 in words is "one billion, six hundred sixty-two million, three hundred forty-two thousand, six hundred sixty-one".