1661211422424 has 48 divisors (see below), whose sum is σ = 4499176315920. Its totient is φ = 553729504320.

The previous prime is 1661211422419. The next prime is 1661211422461. The reversal of 1661211422424 is 4242241121661.

1661211422424 is a `hidden beast` number, since 1 + 6 + 612 + 1 + 14 + 2 + 2 + 4 + 24 = 666.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7945029 + ... + 8151435.

It is an arithmetic number, because the mean of its divisors is an integer number (93732839915).

Almost surely, 2^{1661211422424} is an apocalyptic number.

It is an amenable number.

1661211422424 is an abundant number, since it is smaller than the sum of its proper divisors (2837964893496).

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

1661211422424 is a wasteful number, since it uses less digits than its factorization.

1661211422424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318200 (or 318193 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The spelling of 1661211422424 in words is "one trillion, six hundred sixty-one billion, two hundred eleven million, four hundred twenty-two thousand, four hundred twenty-four".