66022222715555 has 16 divisors (see below), whose sum is σ = 79435381874688. Its totient is φ = 52678711932000.

The previous prime is 66022222715551. The next prime is 66022222715557. The reversal of 66022222715555 is 55551722222066.

It is not a de Polignac number, because 66022222715555 - 2² = 66022222715551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66022222715551) 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, 2076110 + ... + 11677100.

It is an arithmetic number, because the mean of its divisors is an integer number (4964711367168).

Almost surely, 2^{66022222715555} is an apocalyptic number.

66022222715555 is a deficient number, since it is larger than the sum of its proper divisors (13413159159133).

66022222715555 is a wasteful number, since it uses less digits than its factorization.

66022222715555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9604618.

The product of its (nonzero) digits is 5040000, while the sum is 50.

The spelling of 66022222715555 in words is "sixty-six trillion, twenty-two billion, two hundred twenty-two million, seven hundred fifteen thousand, five hundred fifty-five".