667474057 has 4 divisors (see below), whose sum is σ = 667725520. Its totient is φ = 667222596.

The previous prime is 667474019. The next prime is 667474061. The reversal of 667474057 is 750474766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667474057 - 2¹¹ = 667472009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667473998 and 667474016.

It is not an unprimeable number, because it can be changed into a prime (667474097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121707 + ... + 127072.

It is an arithmetic number, because the mean of its divisors is an integer number (166931380).

Almost surely, 2^667474057 is an apocalyptic number.

It is an amenable number.

667474057 is a deficient number, since it is larger than the sum of its proper divisors (251463).

667474057 is a wasteful number, since it uses less digits than its factorization.

667474057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251462.

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 667474057 is about 25835.5192903104. The cubic root of 667474057 is about 873.9329826761.

The spelling of 667474057 in words is "six hundred sixty-seven million, four hundred seventy-four thousand, fifty-seven".