677961761 has 4 divisors (see below), whose sum is σ = 678168624. Its totient is φ = 677754900.

The previous prime is 677961749. The next prime is 677961769. The reversal of 677961761 is 167169776.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677961761 is a prime.

It is a super-2 number, since 2×677961761² = 919264298756442242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677961769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98435 + ... + 105096.

It is an arithmetic number, because the mean of its divisors is an integer number (169542156).

Almost surely, 2^677961761 is an apocalyptic number.

It is an amenable number.

677961761 is a deficient number, since it is larger than the sum of its proper divisors (206863).

677961761 is a wasteful number, since it uses less digits than its factorization.

677961761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206862.

The product of its digits is 666792, while the sum is 50.

The square root of 677961761 is about 26037.6988422556. The cubic root of 677961761 is about 878.4864482838.

The spelling of 677961761 in words is "six hundred seventy-seven million, nine hundred sixty-one thousand, seven hundred sixty-one".