66620102 has 4 divisors (see below), whose sum is σ = 99930156. Its totient is φ = 33310050.

The previous prime is 66620087. The next prime is 66620117. The reversal of 66620102 is 20102666.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66620087) and next prime (66620117).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16655024 + ... + 16655027.

It is an arithmetic number, because the mean of its divisors is an integer number (24982539).

Almost surely, 2^66620102 is an apocalyptic number.

66620102 is a deficient number, since it is larger than the sum of its proper divisors (33310054).

66620102 is a wasteful number, since it uses less digits than its factorization.

66620102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33310053.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66620102 is about 8162.1138193485. The cubic root of 66620102 is about 405.3857058138.

Adding to 66620102 its reverse (20102666), we get a palindrome (86722768).

The spelling of 66620102 in words is "sixty-six million, six hundred twenty thousand, one hundred two".