678517077 has 32 divisors (see below), whose sum is σ = 1079205120. Its totient is φ = 371105280.

The previous prime is 678517069. The next prime is 678517079. The reversal of 678517077 is 770715876.

It is not a de Polignac number, because 678517077 - 2³ = 678517069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678517079) 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, 38199 + ... + 53067.

It is an arithmetic number, because the mean of its divisors is an integer number (33725160).

Almost surely, 2^678517077 is an apocalyptic number.

It is an amenable number.

678517077 is a deficient number, since it is larger than the sum of its proper divisors (400688043).

678517077 is a wasteful number, since it uses less digits than its factorization.

678517077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14973.

The product of its (nonzero) digits is 576240, while the sum is 48.

The square root of 678517077 is about 26048.3603514693. The cubic root of 678517077 is about 878.7262378382.

The spelling of 678517077 in words is "six hundred seventy-eight million, five hundred seventeen thousand, seventy-seven".