667275572766 has 32 divisors (see below), whose sum is σ = 1458734313600. Its totient is φ = 201807450080.

The previous prime is 667275572687. The next prime is 667275572773.

667275572766 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×667275572766³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 667275572697 and 667275572706.

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, 9897876 + ... + 9965063.

It is an arithmetic number, because the mean of its divisors is an integer number (45585447300).

Almost surely, 2^667275572766 is an apocalyptic number.

667275572766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

667275572766 is an abundant number, since it is smaller than the sum of its proper divisors (791458740834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667275572766 is a wasteful number, since it uses less digits than its factorization.

667275572766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19863464.

The product of its digits is 311169600, while the sum is 66.

The spelling of 667275572766 in words is "six hundred sixty-seven billion, two hundred seventy-five million, five hundred seventy-two thousand, seven hundred sixty-six".