1661446263 has 8 divisors (see below), whose sum is σ = 2237195376. Its totient is φ = 1096664000.

The previous prime is 1661446253. The next prime is 1661446273. The reversal of 1661446263 is 3626441661.

1661446263 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1661446253) and next prime (1661446273).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1661446263 - 2⁴ = 1661446247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661446223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2741358 + ... + 2741963.

It is an arithmetic number, because the mean of its divisors is an integer number (279649422).

Almost surely, 2^1661446263 is an apocalyptic number.

1661446263 is a deficient number, since it is larger than the sum of its proper divisors (575749113).

1661446263 is a wasteful number, since it uses less digits than its factorization.

1661446263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483425.

The product of its digits is 124416, while the sum is 39.

The square root of 1661446263 is about 40760.8422753996. The cubic root of 1661446263 is about 1184.3919121911.

The spelling of 1661446263 in words is "one billion, six hundred sixty-one million, four hundred forty-six thousand, two hundred sixty-three".