16660723455 has 48 divisors (see below), whose sum is σ = 29582192640. Its totient is φ = 8669674944.

The previous prime is 16660723427. The next prime is 16660723493. The reversal of 16660723455 is 55432706661.

It is not a de Polignac number, because 16660723455 - 2⁷ = 16660723327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16660723455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2006322 + ... + 2014608.

It is an arithmetic number, because the mean of its divisors is an integer number (616295680).

Almost surely, 2^16660723455 is an apocalyptic number.

16660723455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16660723455 is a deficient number, since it is larger than the sum of its proper divisors (12921469185).

16660723455 is a wasteful number, since it uses less digits than its factorization.

16660723455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380 (or 9377 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 16660723455 in words is "sixteen billion, six hundred sixty million, seven hundred twenty-three thousand, four hundred fifty-five".