667405374 has 32 divisors (see below), whose sum is σ = 1351516320. Its totient is φ = 219696000.

The previous prime is 667405373. The next prime is 667405399. The reversal of 667405374 is 473504766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667405373) 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, 278172 + ... + 280560.

It is an arithmetic number, because the mean of its divisors is an integer number (42234885).

Almost surely, 2^667405374 is an apocalyptic number.

667405374 is an abundant number, since it is smaller than the sum of its proper divisors (684110946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667405374 is a wasteful number, since it uses less digits than its factorization.

667405374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 423360, while the sum is 42.

The square root of 667405374 is about 25834.1900202038. The cubic root of 667405374 is about 873.9030057817.

The spelling of 667405374 in words is "six hundred sixty-seven million, four hundred five thousand, three hundred seventy-four".