1663303257 has 96 divisors (see below), whose sum is σ = 3086254080. Its totient is φ = 838200960.

The previous prime is 1663303231. The next prime is 1663303309. The reversal of 1663303257 is 7523033661.

1663303257 is a `hidden beast` number, since 16 + 633 + 0 + 3 + 2 + 5 + 7 = 666.

It is not a de Polignac number, because 1663303257 - 2¹⁴ = 1663286873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663303157) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7263219 + ... + 7263447.

It is an arithmetic number, because the mean of its divisors is an integer number (32148480).

Almost surely, 2^1663303257 is an apocalyptic number.

It is an amenable number.

1663303257 is a deficient number, since it is larger than the sum of its proper divisors (1422950823).

1663303257 is a wasteful number, since it uses less digits than its factorization.

1663303257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 36.

The square root of 1663303257 is about 40783.6150555588. The cubic root of 1663303257 is about 1184.8330117736.

The spelling of 1663303257 in words is "one billion, six hundred sixty-three million, three hundred three thousand, two hundred fifty-seven".