1661472414719 has 8 divisors (see below), whose sum is σ = 1792835204832. Its totient is φ = 1530617798880.

The previous prime is 1661472414691. The next prime is 1661472414799. The reversal of 1661472414719 is 9174142741661.

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 1661472414719 - 2²⁸ = 1661203979263 is a prime.

It is a super-2 number, since 2×1661472414719² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661472414799) 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, 127036772 + ... + 127049849.

It is an arithmetic number, because the mean of its divisors is an integer number (224104400604).

Almost surely, 2^{1661472414719} is an apocalyptic number.

1661472414719 is a deficient number, since it is larger than the sum of its proper divisors (131362790113).

1661472414719 is a wasteful number, since it uses less digits than its factorization.

1661472414719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254087137.

The product of its digits is 2032128, while the sum is 53.

The spelling of 1661472414719 in words is "one trillion, six hundred sixty-one billion, four hundred seventy-two million, four hundred fourteen thousand, seven hundred nineteen".