66891190463410 has 8 divisors (see below), whose sum is σ = 120404142834156. Its totient is φ = 26756476185360.

The previous prime is 66891190463359. The next prime is 66891190463467. The reversal of 66891190463410 is 1436409119866.

It can be written as a sum of positive squares in 2 ways, for example, as 64370021286649 + 2521169176761 = 8023093^2 + 1587819^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66891190463410² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3344559523161 + ... + 3344559523180.

Almost surely, 2^{66891190463410} is an apocalyptic number.

66891190463410 is a deficient number, since it is larger than the sum of its proper divisors (53512952370746).

66891190463410 is a wasteful number, since it uses less digits than its factorization.

66891190463410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6689119046348.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 66891190463410 in words is "sixty-six trillion, eight hundred ninety-one billion, one hundred ninety million, four hundred sixty-three thousand, four hundred ten".