1666667500010 has 16 divisors (see below), whose sum is σ = 3000017944872. Its totient is φ = 666663345600.

The previous prime is 1666667500009. The next prime is 1666667500031. The reversal of 1666667500010 is 100057666661.

It can be written as a sum of positive squares in 4 ways, for example, as 646108908481 + 1020558591529 = 803809^2 + 1010227^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2187740 + ... + 2849480.

Almost surely, 2^{1666667500010} is an apocalyptic number.

1666667500010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666667500010 is a deficient number, since it is larger than the sum of its proper divisors (1333350444862).

1666667500010 is a wasteful number, since it uses less digits than its factorization.

1666667500010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913609.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 1666667500010 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-seven million, five hundred thousand, ten".