667736063 has 4 divisors (see below), whose sum is σ = 689275968. Its totient is φ = 646196160.

The previous prime is 667736011. The next prime is 667736089. The reversal of 667736063 is 360637766.

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

It is a cyclic number.

It is not a de Polignac number, because 667736063 - 2²⁶ = 600627199 is a prime.

It is a super-3 number, since 3×667736063³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667736093) 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, 10769906 + ... + 10769967.

It is an arithmetic number, because the mean of its divisors is an integer number (172318992).

Almost surely, 2^667736063 is an apocalyptic number.

667736063 is a deficient number, since it is larger than the sum of its proper divisors (21539905).

667736063 is a wasteful number, since it uses less digits than its factorization.

667736063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21539904.

The product of its (nonzero) digits is 571536, while the sum is 44.

The square root of 667736063 is about 25840.5894476113. The cubic root of 667736063 is about 874.0473170731.

The spelling of 667736063 in words is "six hundred sixty-seven million, seven hundred thirty-six thousand, sixty-three".