66101455942 has 4 divisors (see below), whose sum is σ = 99152183916. Its totient is φ = 33050727970.

The previous prime is 66101455939. The next prime is 66101455949. The reversal of 66101455942 is 24955410166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66101455949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16525363984 + ... + 16525363987.

It is an arithmetic number, because the mean of its divisors is an integer number (24788045979).

Almost surely, 2^66101455942 is an apocalyptic number.

66101455942 is a deficient number, since it is larger than the sum of its proper divisors (33050727974).

66101455942 is a wasteful number, since it uses less digits than its factorization.

66101455942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33050727973.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 66101455942 in words is "sixty-six billion, one hundred one million, four hundred fifty-five thousand, nine hundred forty-two".