66361670 has 16 divisors (see below), whose sum is σ = 124644960. Its totient is φ = 25390464.

The previous prime is 66361663. The next prime is 66361709. The reversal of 66361670 is 7616366.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66361670.

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, 144035 + ... + 144494.

It is an arithmetic number, because the mean of its divisors is an integer number (7790310).

Almost surely, 2^66361670 is an apocalyptic number.

66361670 is a deficient number, since it is larger than the sum of its proper divisors (58283290).

66361670 is a wasteful number, since it uses less digits than its factorization.

66361670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288559.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66361670 is about 8146.2672433453. The cubic root of 66361670 is about 404.8608372152.

The spelling of 66361670 in words is "sixty-six million, three hundred sixty-one thousand, six hundred seventy".