667252033451 has 4 divisors (see below), whose sum is σ = 674749247400. Its totient is φ = 659754819504.

The previous prime is 667252033429. The next prime is 667252033507. The reversal of 667252033451 is 154330252766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667252033451 is a prime.

It is a super-2 number, since 2×667252033451² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667252035451) 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, 3748606841 + ... + 3748607018.

It is an arithmetic number, because the mean of its divisors is an integer number (168687311850).

Almost surely, 2^667252033451 is an apocalyptic number.

667252033451 is a deficient number, since it is larger than the sum of its proper divisors (7497213949).

667252033451 is an equidigital number, since it uses as much as digits as its factorization.

667252033451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497213948.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 667252033451 in words is "six hundred sixty-seven billion, two hundred fifty-two million, thirty-three thousand, four hundred fifty-one".