66605653402 has 16 divisors (see below), whose sum is σ = 104326418880. Its totient is φ = 31832238592.

The previous prime is 66605653397. The next prime is 66605653417. The reversal of 66605653402 is 20435650666.

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, 449008 + ... + 578635.

It is an arithmetic number, because the mean of its divisors is an integer number (6520401180).

Almost surely, 2^66605653402 is an apocalyptic number.

66605653402 is a deficient number, since it is larger than the sum of its proper divisors (37720765478).

66605653402 is a wasteful number, since it uses less digits than its factorization.

66605653402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029077.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 66605653402 in words is "sixty-six billion, six hundred five million, six hundred fifty-three thousand, four hundred two".