667493746 has 8 divisors (see below), whose sum is σ = 1060137180. Its totient is φ = 314114688.

The previous prime is 667493699. The next prime is 667493753. The reversal of 667493746 is 647394766.

667493746 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 666414225 + 1079521 = 25815^2 + 1039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×667493746² = 891095801898225032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667493693 and 667493702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9816051 + ... + 9816118.

Almost surely, 2^667493746 is an apocalyptic number.

667493746 is a deficient number, since it is larger than the sum of its proper divisors (392643434).

667493746 is a wasteful number, since it uses less digits than its factorization.

667493746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19632188.

The product of its digits is 4572288, while the sum is 52.

The square root of 667493746 is about 25835.9003326766. The cubic root of 667493746 is about 873.9415756180.

The spelling of 667493746 in words is "six hundred sixty-seven million, four hundred ninety-three thousand, seven hundred forty-six".