66665102 has 32 divisors (see below), whose sum is σ = 116992512. Its totient is φ = 27902304.

The previous prime is 66665101. The next prime is 66665107. The reversal of 66665102 is 20156666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66665101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119408 + ... + 119964.

It is an arithmetic number, because the mean of its divisors is an integer number (3656016).

Almost surely, 2^66665102 is an apocalyptic number.

66665102 is a deficient number, since it is larger than the sum of its proper divisors (50327410).

66665102 is a wasteful number, since it uses less digits than its factorization.

66665102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66665102 is about 8164.8699928413. The cubic root of 66665102 is about 405.4769608072.

The spelling of 66665102 in words is "sixty-six million, six hundred sixty-five thousand, one hundred two".