667077728255 has 8 divisors (see below), whose sum is σ = 801269704224. Its totient is φ = 533144562400.

The previous prime is 667077728227. The next prime is 667077728309. The reversal of 667077728255 is 552827770766.

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

It is not a de Polignac number, because 667077728255 - 2²⁶ = 667010619391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64696856 + ... + 64707165.

It is an arithmetic number, because the mean of its divisors is an integer number (100158713028).

Almost surely, 2^667077728255 is an apocalyptic number.

667077728255 is a deficient number, since it is larger than the sum of its proper divisors (134191975969).

667077728255 is a wasteful number, since it uses less digits than its factorization.

667077728255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129405057.

The product of its (nonzero) digits is 69148800, while the sum is 62.

The spelling of 667077728255 in words is "six hundred sixty-seven billion, seventy-seven million, seven hundred twenty-eight thousand, two hundred fifty-five".