667523701 has 16 divisors (see below), whose sum is σ = 738105984. Its totient is φ = 599788224.

The previous prime is 667523663. The next prime is 667523743. The reversal of 667523701 is 107325766.

It is a cyclic number.

It is not a de Polignac number, because 667523701 - 2⁷ = 667523573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667523201) 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 in 15 ways as a sum of consecutive naturals, for example, 175320 + ... + 179086.

It is an arithmetic number, because the mean of its divisors is an integer number (46131624).

Almost surely, 2^667523701 is an apocalyptic number.

It is an amenable number.

667523701 is a deficient number, since it is larger than the sum of its proper divisors (70582283).

667523701 is a wasteful number, since it uses less digits than its factorization.

667523701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 667523701 is about 25836.4800427612. The cubic root of 667523701 is about 873.9546486634.

The spelling of 667523701 in words is "six hundred sixty-seven million, five hundred twenty-three thousand, seven hundred one".