1687020201667 has 8 divisors (see below), whose sum is σ = 1829823921072. Its totient is φ = 1549057286400.

The previous prime is 1687020201661. The next prime is 1687020201677. The reversal of 1687020201667 is 7661020207861.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1687020201667 - 2²³ = 1687011813059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1687020201661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210200309 + ... + 1210201702.

It is an arithmetic number, because the mean of its divisors is an integer number (228727990134).

Almost surely, 2^{1687020201667} is an apocalyptic number.

1687020201667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1687020201667 is a deficient number, since it is larger than the sum of its proper divisors (142803719405).

1687020201667 is a wasteful number, since it uses less digits than its factorization.

1687020201667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420402069.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 1687020201667 in words is "one trillion, six hundred eighty-seven billion, twenty million, two hundred one thousand, six hundred sixty-seven".