1663087401 has 6 divisors (see below), whose sum is σ = 2402237370. Its totient is φ = 1108724928.

The previous prime is 1663087397. The next prime is 1663087409. The reversal of 1663087401 is 1047803661.

1663087401 is a `hidden beast` number, since 16 + 630 + 8 + 7 + 4 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1570061376 + 93026025 = 39624^2 + 9645^2 .

It is not a de Polignac number, because 1663087401 - 2² = 1663087397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663087409) 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 5 ways as a sum of consecutive naturals, for example, 92393736 + ... + 92393753.

It is an arithmetic number, because the mean of its divisors is an integer number (400372895).

Almost surely, 2^1663087401 is an apocalyptic number.

It is an amenable number.

1663087401 is a deficient number, since it is larger than the sum of its proper divisors (739149969).

1663087401 is a wasteful number, since it uses less digits than its factorization.

1663087401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184787495 (or 184787492 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1663087401 is about 40780.9686128223. The cubic root of 1663087401 is about 1184.7817554602.

The spelling of 1663087401 in words is "one billion, six hundred sixty-three million, eighty-seven thousand, four hundred one".