667552363255766 has 16 divisors (see below), whose sum is σ = 1011244846883040. Its totient is φ = 330470761732800.

The previous prime is 667552363255727. The next prime is 667552363255787.

It is a happy number.

667552363255766 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 667552363255693 and 667552363255702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98681090 + ... + 105228618.

It is an arithmetic number, because the mean of its divisors is an integer number (63202802930190).

Almost surely, 2^{667552363255766} is an apocalyptic number.

667552363255766 is a deficient number, since it is larger than the sum of its proper divisors (343692483627274).

667552363255766 is a wasteful number, since it uses less digits than its factorization.

667552363255766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7052359.

The product of its digits is 8573040000, while the sum is 74.

The spelling of 667552363255766 in words is "six hundred sixty-seven trillion, five hundred fifty-two billion, three hundred sixty-three million, two hundred fifty-five thousand, seven hundred sixty-six".