667663741 has 8 divisors (see below), whose sum is σ = 671726304. Its totient is φ = 663614160.

The previous prime is 667663739. The next prime is 667663807. The reversal of 667663741 is 147366766.

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

It is a cyclic number.

It is not a de Polignac number, because 667663741 - 2¹ = 667663739 is a prime.

It is a super-2 number, since 2×667663741² = 891549742092230162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667663691 and 667663700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667669741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111951 + ... + 117763.

It is an arithmetic number, because the mean of its divisors is an integer number (83965788).

Almost surely, 2^667663741 is an apocalyptic number.

It is an amenable number.

667663741 is a deficient number, since it is larger than the sum of its proper divisors (4062563).

667663741 is a wasteful number, since it uses less digits than its factorization.

667663741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491.

The product of its digits is 762048, while the sum is 46.

The square root of 667663741 is about 25839.1900221350. The cubic root of 667663741 is about 874.0157601272.

It can be divided in two parts, 66766 and 3741, that added together give a palindrome (70507).

The spelling of 667663741 in words is "six hundred sixty-seven million, six hundred sixty-three thousand, seven hundred forty-one".