667072401 has 16 divisors (see below), whose sum is σ = 945028800. Its totient is φ = 418545984.

The previous prime is 667072361. The next prime is 667072421. The reversal of 667072401 is 104270766.

It is not a de Polignac number, because 667072401 - 2¹¹ = 667070353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667072421) 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, 7891 + ... + 37368.

It is an arithmetic number, because the mean of its divisors is an integer number (59064300).

Almost surely, 2^667072401 is an apocalyptic number.

It is an amenable number.

667072401 is a deficient number, since it is larger than the sum of its proper divisors (277956399).

667072401 is an equidigital number, since it uses as much as digits as its factorization.

667072401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45313 (or 45279 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 667072401 is about 25827.7447912124. The cubic root of 667072401 is about 873.7576495899.

The spelling of 667072401 in words is "six hundred sixty-seven million, seventy-two thousand, four hundred one".