1662642536 has 8 divisors (see below), whose sum is σ = 3117454770. Its totient is φ = 831321264.

The previous prime is 1662642533. The next prime is 1662642539. The reversal of 1662642536 is 6352462661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1662642533) and next prime (1662642539).

It can be written as a sum of positive squares in only one way, i.e., 1624573636 + 38068900 = 40306^2 + 6170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1662642536² = 5528760405033022592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1662642493 and 1662642502.

It is not an unprimeable number, because it can be changed into a prime (1662642533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103915151 + ... + 103915166.

Almost surely, 2^1662642536 is an apocalyptic number.

It is an amenable number.

1662642536 is a deficient number, since it is larger than the sum of its proper divisors (1454812234).

1662642536 is a wasteful number, since it uses less digits than its factorization.

1662642536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207830323 (or 207830319 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 1662642536 is about 40775.5139268655. The cubic root of 1662642536 is about 1184.6761055831.

The spelling of 1662642536 in words is "one billion, six hundred sixty-two million, six hundred forty-two thousand, five hundred thirty-six".