680477761 has 4 divisors (see below), whose sum is σ = 716292400. Its totient is φ = 644663124.

The previous prime is 680477737. The next prime is 680477789. The reversal of 680477761 is 167774086.

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, and also an emirpimes, since its reverse is a distinct semiprime: 167774086 = 2 ⋅83887043.

It is a cyclic number.

It is not a de Polignac number, because 680477761 - 2⁵ = 680477729 is a prime.

It is a super-3 number, since 3×680477761³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (680478761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17907291 + ... + 17907328.

It is an arithmetic number, because the mean of its divisors is an integer number (179073100).

Almost surely, 2^680477761 is an apocalyptic number.

It is an amenable number.

680477761 is a deficient number, since it is larger than the sum of its proper divisors (35814639).

680477761 is a wasteful number, since it uses less digits than its factorization.

680477761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35814638.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 680477761 is about 26085.9686613321. The cubic root of 680477761 is about 879.5718307034.

The spelling of 680477761 in words is "six hundred eighty million, four hundred seventy-seven thousand, seven hundred sixty-one".