10001010991966 has 16 divisors (see below), whose sum is σ = 15213048352128. Its totient is φ = 4929997123800.

The previous prime is 10001010991919. The next prime is 10001010991967. The reversal of 10001010991966 is 66919901010001.

It is a happy number.

It is a super-2 number, since 2×10001010991966² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001010991967) 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, 8924101 + ... + 9982063.

It is an arithmetic number, because the mean of its divisors is an integer number (950815522008).

Almost surely, 2^{10001010991966} is an apocalyptic number.

10001010991966 is a deficient number, since it is larger than the sum of its proper divisors (5212037360162).

10001010991966 is a wasteful number, since it uses less digits than its factorization.

10001010991966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124607.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 10001010991966 in words is "ten trillion, one billion, ten million, nine hundred ninety-one thousand, nine hundred sixty-six".