667795551 has 8 divisors (see below), whose sum is σ = 891280560. Its totient is φ = 444753792.

The previous prime is 667795519. The next prime is 667795553. The reversal of 667795551 is 155597766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667795551 - 2⁵ = 667795519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667795494 and 667795503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667795553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107280 + ... + 113333.

It is an arithmetic number, because the mean of its divisors is an integer number (111410070).

Almost surely, 2^667795551 is an apocalyptic number.

667795551 is a deficient number, since it is larger than the sum of its proper divisors (223485009).

667795551 is a wasteful number, since it uses less digits than its factorization.

667795551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221625.

The product of its digits is 1984500, while the sum is 51.

The square root of 667795551 is about 25841.7404793098. The cubic root of 667795551 is about 874.0732723298.

The spelling of 667795551 in words is "six hundred sixty-seven million, seven hundred ninety-five thousand, five hundred fifty-one".