1666670337020 has 48 divisors (see below), whose sum is σ = 3833124513120. Its totient is φ = 604955694336.

The previous prime is 1666670336983. The next prime is 1666670337023. The reversal of 1666670337020 is 207330766661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666670337023) 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, 54308987 + ... + 54339666.

It is an arithmetic number, because the mean of its divisors is an integer number (79856760690).

Almost surely, 2^{1666670337020} is an apocalyptic number.

1666670337020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666670337020 is an abundant number, since it is smaller than the sum of its proper divisors (2166454176100).

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

1666670337020 is a wasteful number, since it uses less digits than its factorization.

1666670337020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108648734 (or 108648732 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 1666670337020 in words is "one trillion, six hundred sixty-six billion, six hundred seventy million, three hundred thirty-seven thousand, twenty".