866710021475542 has 32 divisors (see below), whose sum is σ = 1321648640492544. Its totient is φ = 426225653916000.

The previous prime is 866710021475513. The next prime is 866710021475579. The reversal of 866710021475542 is 245574120017668.

It is a happy number.

It is a super-2 number, since 2×866710021475542² (a number of 31 digits) contains 22 as substring.

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, 436317 + ... + 41636647.

It is an arithmetic number, because the mean of its divisors is an integer number (41301520015392).

Almost surely, 2^{866710021475542} is an apocalyptic number.

866710021475542 is a deficient number, since it is larger than the sum of its proper divisors (454938619017002).

866710021475542 is a wasteful number, since it uses less digits than its factorization.

866710021475542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41201124.

The product of its (nonzero) digits is 22579200, while the sum is 58.

The spelling of 866710021475542 in words is "eight hundred sixty-six trillion, seven hundred ten billion, twenty-one million, four hundred seventy-five thousand, five hundred forty-two".