1066621642215 has 8 divisors (see below), whose sum is σ = 1706594627568. Its totient is φ = 568864875840.

The previous prime is 1066621642213. The next prime is 1066621642267. The reversal of 1066621642215 is 5122461266601.

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

It is not a de Polignac number, because 1066621642215 - 2¹ = 1066621642213 is a prime.

It is a super-2 number, since 2×1066621642215² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066621642213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35554054726 + ... + 35554054755.

It is an arithmetic number, because the mean of its divisors is an integer number (213324328446).

Almost surely, 2^{1066621642215} is an apocalyptic number.

1066621642215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1066621642215 is a deficient number, since it is larger than the sum of its proper divisors (639972985353).

1066621642215 is an equidigital number, since it uses as much as digits as its factorization.

1066621642215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71108109489.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 1066621642215 in words is "one trillion, sixty-six billion, six hundred twenty-one million, six hundred forty-two thousand, two hundred fifteen".