16660581452 has 24 divisors (see below), whose sum is σ = 30994425840. Its totient is φ = 7813713600.

The previous prime is 16660581419. The next prime is 16660581481. The reversal of 16660581452 is 25418506661.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 1077563 + ... + 1092914.

It is an arithmetic number, because the mean of its divisors is an integer number (1291434410).

Almost surely, 2^16660581452 is an apocalyptic number.

It is an amenable number.

16660581452 is a deficient number, since it is larger than the sum of its proper divisors (14333844388).

16660581452 is a wasteful number, since it uses less digits than its factorization.

16660581452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170601 (or 2170599 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 16660581452 in words is "sixteen billion, six hundred sixty million, five hundred eighty-one thousand, four hundred fifty-two".