1660426247 has 8 divisors (see below), whose sum is σ = 1714742400. Its totient is φ = 1606157280.

The previous prime is 1660426237. The next prime is 1660426253. The reversal of 1660426247 is 7426240661.

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 1660426247 - 2¹⁶ = 1660360711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660426247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660426217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68513 + ... + 89525.

It is an arithmetic number, because the mean of its divisors is an integer number (214342800).

Almost surely, 2^1660426247 is an apocalyptic number.

1660426247 is a deficient number, since it is larger than the sum of its proper divisors (54316153).

1660426247 is a wasteful number, since it uses less digits than its factorization.

1660426247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23593.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 1660426247 is about 40748.3281497536. The cubic root of 1660426247 is about 1184.1494836431.

The spelling of 1660426247 in words is "one billion, six hundred sixty million, four hundred twenty-six thousand, two hundred forty-seven".