666677078 has 16 divisors (see below), whose sum is σ = 1021870080. Its totient is φ = 326125800.

The previous prime is 666677071. The next prime is 666677101. The reversal of 666677078 is 870776666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666677071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683 + ... + 36521.

It is an arithmetic number, because the mean of its divisors is an integer number (63866880).

Almost surely, 2^666677078 is an apocalyptic number.

666677078 is a deficient number, since it is larger than the sum of its proper divisors (355193002).

666677078 is a wasteful number, since it uses less digits than its factorization.

666677078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36043.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The square root of 666677078 is about 25820.0905885320. The cubic root of 666677078 is about 873.5850122813.

The spelling of 666677078 in words is "six hundred sixty-six million, six hundred seventy-seven thousand, seventy-eight".