1662321636 has 48 divisors (see below), whose sum is σ = 4311921600. Its totient is φ = 553824576.

The previous prime is 1662321631. The next prime is 1662321641. The reversal of 1662321636 is 6361232661.

1662321636 is a `hidden beast` number, since 1 + 6 + 623 + 21 + 6 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1662321631) and next prime (1662321641).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1662321636.

It is not an unprimeable number, because it can be changed into a prime (1662321631) 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, 406096 + ... + 410168.

It is an arithmetic number, because the mean of its divisors is an integer number (89831700).

Almost surely, 2^1662321636 is an apocalyptic number.

It is an amenable number.

1662321636 is an abundant number, since it is smaller than the sum of its proper divisors (2649599964).

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

1662321636 is a wasteful number, since it uses less digits than its factorization.

1662321636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7865 (or 7857 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 1662321636 is about 40771.5787773787. The cubic root of 1662321636 is about 1184.5998841436.

The spelling of 1662321636 in words is "one billion, six hundred sixty-two million, three hundred twenty-one thousand, six hundred thirty-six".