66242010844 has 24 divisors (see below), whose sum is σ = 122946693408. Its totient is φ = 31161599040.

The previous prime is 66242010827. The next prime is 66242010937. The reversal of 66242010844 is 44801024266.

It is a happy number.

It is a super-2 number, since 2×66242010844² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5896207 + ... + 5907430.

It is an arithmetic number, because the mean of its divisors is an integer number (5122778892).

Almost surely, 2^66242010844 is an apocalyptic number.

It is an amenable number.

66242010844 is a deficient number, since it is larger than the sum of its proper divisors (56704682564).

66242010844 is a wasteful number, since it uses less digits than its factorization.

66242010844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11803725 (or 11803723 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 66242010844 in words is "sixty-six billion, two hundred forty-two million, ten thousand, eight hundred forty-four".