667950677 has 4 divisors (see below), whose sum is σ = 686003436. Its totient is φ = 649897920.

The previous prime is 667950629. The next prime is 667950709. The reversal of 667950677 is 776059766.

667950677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 478778161 + 189172516 = 21881^2 + 13754^2 .

It is a cyclic number.

It is not a de Polignac number, because 667950677 - 2¹² = 667946581 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 (667950617) 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, 9026324 + ... + 9026397.

It is an arithmetic number, because the mean of its divisors is an integer number (171500859).

Almost surely, 2^667950677 is an apocalyptic number.

It is an amenable number.

667950677 is a deficient number, since it is larger than the sum of its proper divisors (18052759).

667950677 is a wasteful number, since it uses less digits than its factorization.

667950677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18052758.

The product of its (nonzero) digits is 3333960, while the sum is 53.

The square root of 667950677 is about 25844.7417669436. The cubic root of 667950677 is about 874.1409482287.

The spelling of 667950677 in words is "six hundred sixty-seven million, nine hundred fifty thousand, six hundred seventy-seven".