666750537453 has 128 divisors (see below), whose sum is σ = 1231993405440. Its totient is φ = 309604965120.

The previous prime is 666750537437. The next prime is 666750537461. The reversal of 666750537453 is 354735057666.

It is not a de Polignac number, because 666750537453 - 2⁴ = 666750537437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666750537393 and 666750537402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666750537473) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11842776 + ... + 11898942.

It is an arithmetic number, because the mean of its divisors is an integer number (9624948480).

Almost surely, 2^666750537453 is an apocalyptic number.

It is an amenable number.

666750537453 is a deficient number, since it is larger than the sum of its proper divisors (565242867987).

666750537453 is a wasteful number, since it uses less digits than its factorization.

666750537453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56327.

The product of its (nonzero) digits is 47628000, while the sum is 57.

The spelling of 666750537453 in words is "six hundred sixty-six billion, seven hundred fifty million, five hundred thirty-seven thousand, four hundred fifty-three".