1672516507666 has 32 divisors (see below), whose sum is σ = 2648502005760. Its totient is φ = 789941342736.

The previous prime is 1672516507637. The next prime is 1672516507681. The reversal of 1672516507666 is 6667056152761.

It is a super-2 number, since 2×1672516507666² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1672516507666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23513431 + ... + 23584453.

It is an arithmetic number, because the mean of its divisors is an integer number (82765687680).

Almost surely, 2^{1672516507666} is an apocalyptic number.

1672516507666 is a deficient number, since it is larger than the sum of its proper divisors (975985498094).

1672516507666 is a wasteful number, since it uses less digits than its factorization.

1672516507666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72838.

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 1672516507666 in words is "one trillion, six hundred seventy-two billion, five hundred sixteen million, five hundred seven thousand, six hundred sixty-six".