8401515007666 has 16 divisors (see below), whose sum is σ = 13748640712128. Its totient is φ = 3818674051600.

The previous prime is 8401515007663. The next prime is 8401515007709. The reversal of 8401515007666 is 6667005151048.

It is not an unprimeable number, because it can be changed into a prime (8401515007663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9382405 + ... + 10238776.

It is an arithmetic number, because the mean of its divisors is an integer number (859290044508).

Almost surely, 2^{8401515007666} is an apocalyptic number.

8401515007666 is a deficient number, since it is larger than the sum of its proper divisors (5347125704462).

8401515007666 is a wasteful number, since it uses less digits than its factorization.

8401515007666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640657.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 8401515007666 in words is "eight trillion, four hundred one billion, five hundred fifteen million, seven thousand, six hundred sixty-six".