1668730451 has 8 divisors (see below), whose sum is σ = 1714414080. Its totient is φ = 1623077568.

The previous prime is 1668730429. The next prime is 1668730487. The reversal of 1668730451 is 1540378661.

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 1668730451 - 2¹⁰ = 1668729427 is a prime.

It is a super-2 number, since 2×1668730451² = 5569322636189326802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1668730399 and 1668730408.

It is not an unprimeable number, because it can be changed into a prime (1668730411) 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, 141095 + ... + 152463.

It is an arithmetic number, because the mean of its divisors is an integer number (214301760).

Almost surely, 2^1668730451 is an apocalyptic number.

1668730451 is a deficient number, since it is larger than the sum of its proper divisors (45683629).

1668730451 is a wasteful number, since it uses less digits than its factorization.

1668730451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15373.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1668730451 is about 40850.0973193455. The cubic root of 1668730451 is about 1186.1202770201.

The spelling of 1668730451 in words is "one billion, six hundred sixty-eight million, seven hundred thirty thousand, four hundred fifty-one".