667377101 has 4 divisors (see below), whose sum is σ = 668399772. Its totient is φ = 666354432.

The previous prime is 667377089. The next prime is 667377107. The reversal of 667377101 is 101773766.

It is a happy number.

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 123787876 + 543589225 = 11126^2 + 23315^2 .

It is a cyclic number.

It is not a de Polignac number, because 667377101 - 2¹⁸ = 667114957 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 (667377107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510356 + ... + 511661.

It is an arithmetic number, because the mean of its divisors is an integer number (167099943).

Almost surely, 2^667377101 is an apocalyptic number.

It is an amenable number.

667377101 is a deficient number, since it is larger than the sum of its proper divisors (1022671).

667377101 is a wasteful number, since it uses less digits than its factorization.

667377101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022670.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 667377101 is about 25833.6428132000. The cubic root of 667377101 is about 873.8906653513.

The spelling of 667377101 in words is "six hundred sixty-seven million, three hundred seventy-seven thousand, one hundred one".