682778654 has 4 divisors (see below), whose sum is σ = 1024167984. Its totient is φ = 341389326.

The previous prime is 682778653. The next prime is 682778659. The reversal of 682778654 is 456877286.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 682778596 and 682778605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682778651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170694662 + ... + 170694665.

It is an arithmetic number, because the mean of its divisors is an integer number (256041996).

Almost surely, 2^682778654 is an apocalyptic number.

682778654 is a deficient number, since it is larger than the sum of its proper divisors (341389330).

682778654 is a wasteful number, since it uses less digits than its factorization.

682778654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341389329.

The product of its digits is 4515840, while the sum is 53.

The square root of 682778654 is about 26130.0335629329. The cubic root of 682778654 is about 880.5620780659.

The spelling of 682778654 in words is "six hundred eighty-two million, seven hundred seventy-eight thousand, six hundred fifty-four".