665660480126 has 8 divisors (see below), whose sum is σ = 1021711434744. Its totient is φ = 325090001880.

The previous prime is 665660480113. The next prime is 665660480129. The reversal of 665660480126 is 621084066566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665660480129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3870118985 + ... + 3870119156.

It is an arithmetic number, because the mean of its divisors is an integer number (127713929343).

Almost surely, 2^665660480126 is an apocalyptic number.

665660480126 is a deficient number, since it is larger than the sum of its proper divisors (356050954618).

665660480126 is a wasteful number, since it uses less digits than its factorization.

665660480126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740238186.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 665660480126 in words is "six hundred sixty-five billion, six hundred sixty million, four hundred eighty thousand, one hundred twenty-six".