1663000951 has 2 divisors, whose sum is σ = 1663000952. Its totient is φ = 1663000950.

The previous prime is 1663000949. The next prime is 1663000961. The reversal of 1663000951 is 1590003661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663000951 - 2¹ = 1663000949 is a prime.

Together with 1663000949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663000961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831500475 + 831500476.

It is an arithmetic number, because the mean of its divisors is an integer number (831500476).

Almost surely, 2^1663000951 is an apocalyptic number.

1663000951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663000951 is an equidigital number, since it uses as much as digits as its factorization.

1663000951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1663000951 is about 40779.9086683627. The cubic root of 1663000951 is about 1184.7612261408.

The spelling of 1663000951 in words is "one billion, six hundred sixty-three million, nine hundred fifty-one", and thus it is an aban number.