660772967401 has 4 divisors (see below), whose sum is σ = 660777269904. Its totient is φ = 660768664900.

The previous prime is 660772967389. The next prime is 660772967441. The reversal of 660772967401 is 104769277066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660772967401 - 2²⁵ = 660739412969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660772967441) 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, 1912015 + ... + 2230996.

It is an arithmetic number, because the mean of its divisors is an integer number (165194317476).

Almost surely, 2^660772967401 is an apocalyptic number.

It is an amenable number.

660772967401 is a deficient number, since it is larger than the sum of its proper divisors (4302503).

660772967401 is a wasteful number, since it uses less digits than its factorization.

660772967401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302502.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 660772967401 in words is "six hundred sixty billion, seven hundred seventy-two million, nine hundred sixty-seven thousand, four hundred one".