66700678 has 16 divisors (see below), whose sum is σ = 114891840. Its totient is φ = 28722600.

The previous prime is 66700657. The next prime is 66700691. The reversal of 66700678 is 87600766.

It is a self number, because there is not a number n which added to its sum of digits gives 66700678.

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, 79368 + ... + 80203.

It is an arithmetic number, because the mean of its divisors is an integer number (7180740).

Almost surely, 2^66700678 is an apocalyptic number.

66700678 is a deficient number, since it is larger than the sum of its proper divisors (48191162).

66700678 is a wasteful number, since it uses less digits than its factorization.

66700678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159603.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 66700678 is about 8167.0483040080. The cubic root of 66700678 is about 405.5490759152.

The spelling of 66700678 in words is "sixty-six million, seven hundred thousand, six hundred seventy-eight".