667149601 has 16 divisors (see below), whose sum is σ = 697745664. Its totient is φ = 637401744.

The previous prime is 667149589. The next prime is 667149629. The reversal of 667149601 is 106941766.

667149601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 667149601 - 2¹¹ = 667147553 is a prime.

It is a super-2 number, since 2×667149601² = 890177180228918402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667149671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381010 + ... + 382756.

It is an arithmetic number, because the mean of its divisors is an integer number (43609104).

Almost surely, 2^667149601 is an apocalyptic number.

It is an amenable number.

667149601 is a deficient number, since it is larger than the sum of its proper divisors (30596063).

667149601 is a wasteful number, since it uses less digits than its factorization.

667149601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 667149601 is about 25829.2392648332. The cubic root of 667149601 is about 873.7913548211.

The spelling of 667149601 in words is "six hundred sixty-seven million, one hundred forty-nine thousand, six hundred one".