667764480687 has 16 divisors (see below), whose sum is σ = 932151507840. Its totient is φ = 424646788832.

The previous prime is 667764480659. The next prime is 667764480767. The reversal of 667764480687 is 786084467766.

It is a cyclic number.

It is not a de Polignac number, because 667764480687 - 2¹¹ = 667764478639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667764480637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46230453 + ... + 46244894.

It is an arithmetic number, because the mean of its divisors is an integer number (58259469240).

Almost surely, 2^667764480687 is an apocalyptic number.

667764480687 is a deficient number, since it is larger than the sum of its proper divisors (264387027153).

667764480687 is a wasteful number, since it uses less digits than its factorization.

667764480687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92475462.

The product of its (nonzero) digits is 455196672, while the sum is 69.

The spelling of 667764480687 in words is "six hundred sixty-seven billion, seven hundred sixty-four million, four hundred eighty thousand, six hundred eighty-seven".