66601842 has 24 divisors (see below), whose sum is σ = 135118224. Its totient is φ = 21885984.

The previous prime is 66601831. The next prime is 66601853. The reversal of 66601842 is 24810666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66601831) and next prime (66601853).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30933 + ... + 33015.

It is an arithmetic number, because the mean of its divisors is an integer number (5629926).

Almost surely, 2^66601842 is an apocalyptic number.

66601842 is an abundant number, since it is smaller than the sum of its proper divisors (68516382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66601842 is a wasteful number, since it uses less digits than its factorization.

66601842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 66601842 is about 8160.9951599054. The cubic root of 66601842 is about 405.3486648448.

The spelling of 66601842 in words is "sixty-six million, six hundred one thousand, eight hundred forty-two".