666076477 has 4 divisors (see below), whose sum is σ = 726628896. Its totient is φ = 605524060.

The previous prime is 666076459. The next prime is 666076487. The reversal of 666076477 is 774670666.

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-666076477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666076477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666076487) 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 3 ways as a sum of consecutive naturals, for example, 30276193 + ... + 30276214.

It is an arithmetic number, because the mean of its divisors is an integer number (181657224).

Almost surely, 2^666076477 is an apocalyptic number.

It is an amenable number.

666076477 is a deficient number, since it is larger than the sum of its proper divisors (60552419).

666076477 is a wasteful number, since it uses less digits than its factorization.

666076477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60552418.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The square root of 666076477 is about 25808.4574703720. The cubic root of 666076477 is about 873.3225995450.

The spelling of 666076477 in words is "six hundred sixty-six million, seventy-six thousand, four hundred seventy-seven".