666771004 has 12 divisors (see below), whose sum is σ = 1167195064. Its totient is φ = 333286704.

The previous prime is 666770983. The next prime is 666771019. The reversal of 666771004 is 400177666.

It is a congruent number.

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, 8307 + ... + 37450.

Almost surely, 2^666771004 is an apocalyptic number.

It is an amenable number.

666771004 is a deficient number, since it is larger than the sum of its proper divisors (500424060).

666771004 is a wasteful number, since it uses less digits than its factorization.

666771004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49404 (or 49402 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 666771004 is about 25821.9093794398. The cubic root of 666771004 is about 873.6260358871.

The spelling of 666771004 in words is "six hundred sixty-six million, seven hundred seventy-one thousand, four".