667357149901 has 4 divisors (see below), whose sum is σ = 718692315292. Its totient is φ = 616021984512.

The previous prime is 667357149869. The next prime is 667357149919. The reversal of 667357149901 is 109941753766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45262137001 + 622095012900 = 212749^2 + 788730^2 .

It is a cyclic number.

It is not a de Polignac number, because 667357149901 - 2⁵ = 667357149869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667357149961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25667582676 + ... + 25667582701.

It is an arithmetic number, because the mean of its divisors is an integer number (179673078823).

Almost surely, 2^667357149901 is an apocalyptic number.

It is an amenable number.

667357149901 is a deficient number, since it is larger than the sum of its proper divisors (51335165391).

667357149901 is a wasteful number, since it uses less digits than its factorization.

667357149901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51335165390.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 667357149901 in words is "six hundred sixty-seven billion, three hundred fifty-seven million, one hundred forty-nine thousand, nine hundred one".