678161753 has 4 divisors (see below), whose sum is σ = 689656080. Its totient is φ = 666667428.

The previous prime is 678161713. The next prime is 678161761. The reversal of 678161753 is 357161876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678161753 - 2¹⁸ = 677899609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678161713) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5747075 + ... + 5747192.

It is an arithmetic number, because the mean of its divisors is an integer number (172414020).

Almost surely, 2^678161753 is an apocalyptic number.

It is an amenable number.

678161753 is a deficient number, since it is larger than the sum of its proper divisors (11494327).

678161753 is a wasteful number, since it uses less digits than its factorization.

678161753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494326.

The product of its digits is 211680, while the sum is 44.

The square root of 678161753 is about 26041.5389906204. The cubic root of 678161753 is about 878.5728213897.

The spelling of 678161753 in words is "six hundred seventy-eight million, one hundred sixty-one thousand, seven hundred fifty-three".