1661472414690 has 32 divisors (see below), whose sum is σ = 4350036868416. Its totient is φ = 402781191360.

The previous prime is 1661472414677. The next prime is 1661472414691. The reversal of 1661472414690 is 964142741661.

It is a happy number.

It is a super-2 number, since 2×1661472414690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1661472414691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517382117 + ... + 2517382776.

It is an arithmetic number, because the mean of its divisors is an integer number (135938652138).

Almost surely, 2^{1661472414690} is an apocalyptic number.

1661472414690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661472414690 is an abundant number, since it is smaller than the sum of its proper divisors (2688564453726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661472414690 is a wasteful number, since it uses less digits than its factorization.

1661472414690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034764914.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 1661472414690 in words is "one trillion, six hundred sixty-one billion, four hundred seventy-two million, four hundred fourteen thousand, six hundred ninety".