667376531266642 has 64 divisors (see below), whose sum is σ = 1023521197944960. Its totient is φ = 326269746399744.

The previous prime is 667376531266573. The next prime is 667376531266663. The reversal of 667376531266642 is 246662135673766.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25378415238 + ... + 25378441534.

It is an arithmetic number, because the mean of its divisors is an integer number (15992518717890).

Almost surely, 2^{667376531266642} is an apocalyptic number.

667376531266642 is a deficient number, since it is larger than the sum of its proper divisors (356144666678318).

667376531266642 is a wasteful number, since it uses less digits than its factorization.

667376531266642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28267.

The product of its digits is 1646023680, while the sum is 70.

The spelling of 667376531266642 in words is "six hundred sixty-seven trillion, three hundred seventy-six billion, five hundred thirty-one million, two hundred sixty-six thousand, six hundred forty-two".