666140737102436 has 6 divisors (see below), whose sum is σ = 1165746289929270. Its totient is φ = 333070368551216.

The previous prime is 666140737102429. The next prime is 666140737102441. The reversal of 666140737102436 is 634201737041666.

It can be written as a sum of positive squares in only one way, i.e., 417531600288100 + 248609136814336 = 20433590^2 + 15767344^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83267592137801 + ... + 83267592137808.

It is an arithmetic number, because the mean of its divisors is an integer number (194291048321545).

Almost surely, 2^{666140737102436} is an apocalyptic number.

It is an amenable number.

666140737102436 is a deficient number, since it is larger than the sum of its proper divisors (499605552826834).

666140737102436 is a wasteful number, since it uses less digits than its factorization.

666140737102436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166535184275613 (or 166535184275611 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 56.

The spelling of 666140737102436 in words is "six hundred sixty-six trillion, one hundred forty billion, seven hundred thirty-seven million, one hundred two thousand, four hundred thirty-six".