1661142024 has 24 divisors (see below), whose sum is σ = 4498926510. Its totient is φ = 553713984.

The previous prime is 1661141971. The next prime is 1661142107. The reversal of 1661142024 is 4202411661.

1661142024 is a `hidden beast` number, since 1 + 6 + 611 + 4 + 20 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1473177924 + 187964100 = 38382^2 + 13710^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11535637 + ... + 11535780.

Almost surely, 2^1661142024 is an apocalyptic number.

It is an amenable number.

1661142024 is an abundant number, since it is smaller than the sum of its proper divisors (2837784486).

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

1661142024 is a wasteful number, since it uses less digits than its factorization.

1661142024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23071429 (or 23071422 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1661142024 is about 40757.1101036371. The cubic root of 1661142024 is about 1184.3196136931.

Adding to 1661142024 its reverse (4202411661), we get a palindrome (5863553685).

The spelling of 1661142024 in words is "one billion, six hundred sixty-one million, one hundred forty-two thousand, twenty-four".