1662642252 has 36 divisors (see below), whose sum is σ = 4265524536. Its totient is φ = 545941440.

The previous prime is 1662642227. The next prime is 1662642259. The reversal of 1662642252 is 2522462661.

1662642252 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 642 + 2 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (1662642259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342249 + ... + 347072.

Almost surely, 2^1662642252 is an apocalyptic number.

1662642252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1662642252 is an abundant number, since it is smaller than the sum of its proper divisors (2602882284).

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

1662642252 is a wasteful number, since it uses less digits than its factorization.

1662642252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689398 (or 689393 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1662642252 is about 40775.5104443832. The cubic root of 1662642252 is about 1184.6760381307.

The spelling of 1662642252 in words is "one billion, six hundred sixty-two million, six hundred forty-two thousand, two hundred fifty-two".