66291801263054 has 32 divisors (see below), whose sum is σ = 103291663319040. Its totient is φ = 31874774421600.

The previous prime is 66291801263053. The next prime is 66291801263101. The reversal of 66291801263054 is 45036210819266.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66291801262987 and 66291801263005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66291801263053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62851712 + ... + 63897740.

It is an arithmetic number, because the mean of its divisors is an integer number (3227864478720).

Almost surely, 2^{66291801263054} is an apocalyptic number.

66291801263054 is a deficient number, since it is larger than the sum of its proper divisors (36999862055986).

66291801263054 is a wasteful number, since it uses less digits than its factorization.

66291801263054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052496.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 66291801263054 in words is "sixty-six trillion, two hundred ninety-one billion, eight hundred one million, two hundred sixty-three thousand, fifty-four".