1258466661 has 12 divisors (see below), whose sum is σ = 1847585740. Its totient is φ = 825223680.

The previous prime is 1258466621. The next prime is 1258466707. The reversal of 1258466661 is 1666648521.

It can be written as a sum of positive squares in 2 ways, for example, as 630964161 + 627502500 = 25119^2 + 25050^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1258466661 is a prime.

It is a super-3 number, since 3×1258466661³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258466621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1145596 + ... + 1146693.

Almost surely, 2^1258466661 is an apocalyptic number.

It is an amenable number.

1258466661 is a deficient number, since it is larger than the sum of its proper divisors (589119079).

1258466661 is a wasteful number, since it uses less digits than its factorization.

1258466661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292356 (or 2292353 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 1258466661 is about 35474.8736572803. The cubic root of 1258466661 is about 1079.6439901686.

The spelling of 1258466661 in words is "one billion, two hundred fifty-eight million, four hundred sixty-six thousand, six hundred sixty-one".