66542102 has 16 divisors (see below), whose sum is σ = 109890000. Its totient is φ = 29967840.

The previous prime is 66542101. The next prime is 66542107. The reversal of 66542102 is 20124566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66542101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11477 + ... + 16272.

It is an arithmetic number, because the mean of its divisors is an integer number (6868125).

Almost surely, 2^66542102 is an apocalyptic number.

66542102 is a deficient number, since it is larger than the sum of its proper divisors (43347898).

66542102 is a wasteful number, since it uses less digits than its factorization.

66542102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27871.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66542102 is about 8157.3342459409. The cubic root of 66542102 is about 405.2274330973.

Adding to 66542102 its reverse (20124566), we get a palindrome (86666668).

The spelling of 66542102 in words is "sixty-six million, five hundred forty-two thousand, one hundred two".