678670545 has 32 divisors (see below), whose sum is σ = 1294958592. Its totient is φ = 296759232.

The previous prime is 678670543. The next prime is 678670607. The reversal of 678670545 is 545076876.

It is not a de Polignac number, because 678670545 - 2¹ = 678670543 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 678670494 and 678670503.

It is not an unprimeable number, because it can be changed into a prime (678670543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138097 + ... + 142926.

It is an arithmetic number, because the mean of its divisors is an integer number (40467456).

Almost surely, 2^678670545 is an apocalyptic number.

It is an amenable number.

678670545 is a deficient number, since it is larger than the sum of its proper divisors (616288047).

678670545 is a wasteful number, since it uses less digits than its factorization.

678670545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281061.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The square root of 678670545 is about 26051.3060133269. The cubic root of 678670545 is about 878.7924833790.

The spelling of 678670545 in words is "six hundred seventy-eight million, six hundred seventy thousand, five hundred forty-five".