867660870063531 has 4 divisors (see below), whose sum is σ = 1156881160084712. Its totient is φ = 578440580042352.

The previous prime is 867660870063527. The next prime is 867660870063541. The reversal of 867660870063531 is 135360078066768.

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

It is not a de Polignac number, because 867660870063531 - 2² = 867660870063527 is a prime.

It is a super-2 number, since 2×867660870063531² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (867660870063511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144610145010586 + ... + 144610145010591.

It is an arithmetic number, because the mean of its divisors is an integer number (289220290021178).

Almost surely, 2^{867660870063531} is an apocalyptic number.

867660870063531 is a deficient number, since it is larger than the sum of its proper divisors (289220290021181).

867660870063531 is a wasteful number, since it uses less digits than its factorization.

867660870063531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289220290021180.

The product of its (nonzero) digits is 182891520, while the sum is 66.

The spelling of 867660870063531 in words is "eight hundred sixty-seven trillion, six hundred sixty billion, eight hundred seventy million, sixty-three thousand, five hundred thirty-one".