1663267604 has 6 divisors (see below), whose sum is σ = 2910718314. Its totient is φ = 831633800.

The previous prime is 1663267597. The next prime is 1663267637. The reversal of 1663267604 is 4067623661.

It can be written as a sum of positive squares in only one way, i.e., 1482096004 + 181171600 = 38498^2 + 13460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207908447 + ... + 207908454.

It is an arithmetic number, because the mean of its divisors is an integer number (485119719).

Almost surely, 2^1663267604 is an apocalyptic number.

It is an amenable number.

1663267604 is a deficient number, since it is larger than the sum of its proper divisors (1247450710).

1663267604 is a wasteful number, since it uses less digits than its factorization.

1663267604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415816905 (or 415816903 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 1663267604 is about 40783.1779536612. The cubic root of 1663267604 is about 1184.8245460587.

The spelling of 1663267604 in words is "one billion, six hundred sixty-three million, two hundred sixty-seven thousand, six hundred four".