661143435 has 8 divisors (see below), whose sum is σ = 1057829520. Its totient is φ = 352609824.

The previous prime is 661143419. The next prime is 661143443. The reversal of 661143435 is 534341166.

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

It is not a de Polignac number, because 661143435 - 2⁴ = 661143419 is a prime.

It is a super-2 number, since 2×661143435² = 874221283287198450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661143396 and 661143405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22038100 + ... + 22038129.

It is an arithmetic number, because the mean of its divisors is an integer number (132228690).

Almost surely, 2^661143435 is an apocalyptic number.

661143435 is a deficient number, since it is larger than the sum of its proper divisors (396686085).

661143435 is a wasteful number, since it uses less digits than its factorization.

661143435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44076237.

The product of its digits is 25920, while the sum is 33.

The square root of 661143435 is about 25712.7096005069. The cubic root of 661143435 is about 871.1612778773.

The spelling of 661143435 in words is "six hundred sixty-one million, one hundred forty-three thousand, four hundred thirty-five".