66101842 has 4 divisors (see below), whose sum is σ = 99152766. Its totient is φ = 33050920.

The previous prime is 66101837. The next prime is 66101873. The reversal of 66101842 is 24810166.

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

It can be written as a sum of positive squares in only one way, i.e., 46662561 + 19439281 = 6831^2 + 4409^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66101842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16525459 + ... + 16525462.

Almost surely, 2^66101842 is an apocalyptic number.

66101842 is a deficient number, since it is larger than the sum of its proper divisors (33050924).

66101842 is a wasteful number, since it uses less digits than its factorization.

66101842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33050923.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 66101842 is about 8130.3039303583. The cubic root of 66101842 is about 404.3317578481.

The spelling of 66101842 in words is "sixty-six million, one hundred one thousand, eight hundred forty-two".