666354460725 has 144 divisors (see below), whose sum is σ = 1291548585600. Its totient is φ = 327401141760.

The previous prime is 666354460691. The next prime is 666354460727. The reversal of 666354460725 is 527064453666.

It is not a de Polignac number, because 666354460725 - 2¹¹ = 666354458677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666354460727) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 62876127 + ... + 62886723.

It is an arithmetic number, because the mean of its divisors is an integer number (8969087400).

Almost surely, 2^666354460725 is an apocalyptic number.

It is an amenable number.

666354460725 is a deficient number, since it is larger than the sum of its proper divisors (625194124875).

666354460725 is a wasteful number, since it uses less digits than its factorization.

666354460725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11084 (or 11076 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 54.

The spelling of 666354460725 in words is "six hundred sixty-six billion, three hundred fifty-four million, four hundred sixty thousand, seven hundred twenty-five".