667850531 has 2 divisors, whose sum is σ = 667850532. Its totient is φ = 667850530.

The previous prime is 667850479. The next prime is 667850539. The reversal of 667850531 is 135058766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667850531 - 2⁶ = 667850467 is a prime.

It is a super-2 number, since 2×667850531² = 892048663513963922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667850539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333925265 + 333925266.

It is an arithmetic number, because the mean of its divisors is an integer number (333925266).

Almost surely, 2^667850531 is an apocalyptic number.

667850531 is a deficient number, since it is larger than the sum of its proper divisors (1).

667850531 is an equidigital number, since it uses as much as digits as its factorization.

667850531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 667850531 is about 25842.8042402523. The cubic root of 667850531 is about 874.0972593268.

The spelling of 667850531 in words is "six hundred sixty-seven million, eight hundred fifty thousand, five hundred thirty-one".