667606637425662 has 128 divisors (see below), whose sum is σ = 1665254418508800. Its totient is φ = 196473494505600.

The previous prime is 667606637425621. The next prime is 667606637425691. The reversal of 667606637425662 is 266524736606766.

667606637425662 is a `hidden beast` number, since 6 + 6 + 7 + 606 + 6 + 3 + 7 + 4 + 2 + 5 + 6 + 6 + 2 = 666.

It is a super-2 number, since 2×667606637425662² (a number of 30 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 in 63 ways as a sum of consecutive naturals, for example, 16183962 + ... + 39964157.

It is an arithmetic number, because the mean of its divisors is an integer number (13009800144600).

Almost surely, 2^{667606637425662} is an apocalyptic number.

667606637425662 is an abundant number, since it is smaller than the sum of its proper divisors (997647781083138).

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

667606637425662 is a wasteful number, since it uses less digits than its factorization.

667606637425662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56148719 (or 56148713 counting only the distinct ones).

The product of its (nonzero) digits is 3292047360, while the sum is 72.

The spelling of 667606637425662 in words is "six hundred sixty-seven trillion, six hundred six billion, six hundred thirty-seven million, four hundred twenty-five thousand, six hundred sixty-two".