66920246895 has 16 divisors (see below), whose sum is σ = 107116317792. Its totient is φ = 35676157440.

The previous prime is 66920246879. The next prime is 66920246923. The reversal of 66920246895 is 59864202966.

It is a happy number.

It is not a de Polignac number, because 66920246895 - 2⁴ = 66920246879 is a prime.

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, 877222 + ... + 950451.

It is an arithmetic number, because the mean of its divisors is an integer number (6694769862).

Almost surely, 2^66920246895 is an apocalyptic number.

66920246895 is a deficient number, since it is larger than the sum of its proper divisors (40196070897).

66920246895 is a wasteful number, since it uses less digits than its factorization.

66920246895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830122.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 66920246895 in words is "sixty-six billion, nine hundred twenty million, two hundred forty-six thousand, eight hundred ninety-five".