1663661151 has 6 divisors (see below), whose sum is σ = 2403066120. Its totient is φ = 1109107428.

The previous prime is 1663661119. The next prime is 1663661161. The reversal of 1663661151 is 1511663661.

1663661151 is a `hidden beast` number, since 1 + 6 + 6 + 36 + 611 + 5 + 1 = 666.

It is not a de Polignac number, because 1663661151 - 2⁵ = 1663661119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663661101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92425611 + ... + 92425628.

It is an arithmetic number, because the mean of its divisors is an integer number (400511020).

Almost surely, 2^1663661151 is an apocalyptic number.

1663661151 is a deficient number, since it is larger than the sum of its proper divisors (739404969).

1663661151 is a wasteful number, since it uses less digits than its factorization.

1663661151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184851245 (or 184851242 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1663661151 is about 40788.0025375110. The cubic root of 1663661151 is about 1184.9179860988.

The spelling of 1663661151 in words is "one billion, six hundred sixty-three million, six hundred sixty-one thousand, one hundred fifty-one".