667542277 has 4 divisors (see below), whose sum is σ = 683066560. Its totient is φ = 652017996.

The previous prime is 667542241. The next prime is 667542287. The reversal of 667542277 is 772245766.

667542277 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667542277 is a prime.

It is a super-2 number, since 2×667542277² = 891225383164689458, which contains 22 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 (667542217) 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, 7762077 + ... + 7762162.

It is an arithmetic number, because the mean of its divisors is an integer number (170766640).

Almost surely, 2^667542277 is an apocalyptic number.

It is an amenable number.

667542277 is a deficient number, since it is larger than the sum of its proper divisors (15524283).

667542277 is a wasteful number, since it uses less digits than its factorization.

667542277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15524282.

The product of its digits is 987840, while the sum is 46.

The square root of 667542277 is about 25836.8395319551. The cubic root of 667542277 is about 873.9627554572.

The spelling of 667542277 in words is "six hundred sixty-seven million, five hundred forty-two thousand, two hundred seventy-seven".