1661510433 has 16 divisors (see below), whose sum is σ = 2432143296. Its totient is φ = 1000559040.

The previous prime is 1661510429. The next prime is 1661510437. The reversal of 1661510433 is 3340151661.

It is an interprime number because it is at equal distance from previous prime (1661510429) and next prime (1661510437).

It is not a de Polignac number, because 1661510433 - 2² = 1661510429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1661510433.

It is not an unprimeable number, because it can be changed into a prime (1661510437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155166 + ... + 165527.

It is an arithmetic number, because the mean of its divisors is an integer number (152008956).

Almost surely, 2^1661510433 is an apocalyptic number.

It is an amenable number.

1661510433 is a deficient number, since it is larger than the sum of its proper divisors (770632863).

1661510433 is a wasteful number, since it uses less digits than its factorization.

1661510433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320864.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1661510433 is about 40761.6294203262. The cubic root of 1661510433 is about 1184.4071602418.

The spelling of 1661510433 in words is "one billion, six hundred sixty-one million, five hundred ten thousand, four hundred thirty-three".