667670407451 has 2 divisors, whose sum is σ = 667670407452. Its totient is φ = 667670407450.

The previous prime is 667670407373. The next prime is 667670407457. The reversal of 667670407451 is 154704076766.

It is a happy number.

667670407451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667670407451 - 2³⁴ = 650490538267 is a prime.

It is a super-3 number, since 3×667670407451³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667670407393 and 667670407402.

It is not a weakly prime, because it can be changed into another prime (667670407457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333835203725 + 333835203726.

It is an arithmetic number, because the mean of its divisors is an integer number (333835203726).

Almost surely, 2^667670407451 is an apocalyptic number.

667670407451 is a deficient number, since it is larger than the sum of its proper divisors (1).

667670407451 is an equidigital number, since it uses as much as digits as its factorization.

667670407451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 53.

The spelling of 667670407451 in words is "six hundred sixty-seven billion, six hundred seventy million, four hundred seven thousand, four hundred fifty-one".