866724458635142 has 4 divisors (see below), whose sum is σ = 1300086687952716. Its totient is φ = 433362229317570.

The previous prime is 866724458635117. The next prime is 866724458635159. The reversal of 866724458635142 is 241536854427668.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×866724458635142² (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 as a sum of consecutive naturals, namely, 216681114658784 + ... + 216681114658787.

It is an arithmetic number, because the mean of its divisors is an integer number (325021671988179).

Almost surely, 2^{866724458635142} is an apocalyptic number.

866724458635142 is a deficient number, since it is larger than the sum of its proper divisors (433362229317574).

866724458635142 is a wasteful number, since it uses less digits than its factorization.

866724458635142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433362229317573.

The product of its digits is 1857945600, while the sum is 71.

The spelling of 866724458635142 in words is "eight hundred sixty-six trillion, seven hundred twenty-four billion, four hundred fifty-eight million, six hundred thirty-five thousand, one hundred forty-two".