1662646242 has 16 divisors (see below), whose sum is σ = 3327860160. Its totient is φ = 553787472.

The previous prime is 1662646217. The next prime is 1662646247. The reversal of 1662646242 is 2426462661.

It is a self number, because there is not a number n which added to its sum of digits gives 1662646242.

It is not an unprimeable number, because it can be changed into a prime (1662646247) 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, 98517 + ... + 114152.

It is an arithmetic number, because the mean of its divisors is an integer number (207991260).

Almost surely, 2^1662646242 is an apocalyptic number.

1662646242 is an abundant number, since it is smaller than the sum of its proper divisors (1665213918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1662646242 is a wasteful number, since it uses less digits than its factorization.

1662646242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213977.

The product of its digits is 165888, while the sum is 39.

The square root of 1662646242 is about 40775.5593707799. The cubic root of 1662646242 is about 1184.6769857897.

The spelling of 1662646242 in words is "one billion, six hundred sixty-two million, six hundred forty-six thousand, two hundred forty-two".