678872511 has 6 divisors (see below), whose sum is σ = 980593640. Its totient is φ = 452581668.

The previous prime is 678872501. The next prime is 678872539. The reversal of 678872511 is 115278876.

It is a happy number.

678872511 is a `hidden beast` number, since 67 + 8 + 8 + 72 + 511 = 666.

It is not a de Polignac number, because 678872511 - 2²⁹ = 142001599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678872501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37715131 + ... + 37715148.

Almost surely, 2^678872511 is an apocalyptic number.

678872511 is a deficient number, since it is larger than the sum of its proper divisors (301721129).

678872511 is a wasteful number, since it uses less digits than its factorization.

678872511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75430285 (or 75430282 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 678872511 is about 26055.1820373606. The cubic root of 678872511 is about 878.8796482049.

It can be divided in two parts, 67 and 8872511, that added together give a triangular number (8872578 = T₄₂₁₂).

The spelling of 678872511 in words is "six hundred seventy-eight million, eight hundred seventy-two thousand, five hundred eleven".