66234126785398 has 32 divisors (see below), whose sum is σ = 117923581268640. Its totient is φ = 27504042255360.

The previous prime is 66234126785377. The next prime is 66234126785447. The reversal of 66234126785398 is 89358762143266.

It is a super-2 number, since 2×66234126785398² (a number of 28 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 15 ways as a sum of consecutive naturals, for example, 1193724093 + ... + 1193779576.

It is an arithmetic number, because the mean of its divisors is an integer number (3685111914645).

Almost surely, 2^{66234126785398} is an apocalyptic number.

66234126785398 is a deficient number, since it is larger than the sum of its proper divisors (51689454483242).

66234126785398 is a wasteful number, since it uses less digits than its factorization.

66234126785398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387503792.

The product of its digits is 627056640, while the sum is 70.

The spelling of 66234126785398 in words is "sixty-six trillion, two hundred thirty-four billion, one hundred twenty-six million, seven hundred eighty-five thousand, three hundred ninety-eight".