1666457423470 has 16 divisors (see below), whose sum is σ = 3428140985568. Its totient is φ = 571356830880.

The previous prime is 1666457423461. The next prime is 1666457423509. The reversal of 1666457423470 is 743247546661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11903267241 + ... + 11903267380.

It is an arithmetic number, because the mean of its divisors is an integer number (214258811598).

Almost surely, 2^{1666457423470} is an apocalyptic number.

1666457423470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666457423470 is an abundant number, since it is smaller than the sum of its proper divisors (1761683562098).

1666457423470 is a wasteful number, since it uses less digits than its factorization.

1666457423470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23806534635.

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 1666457423470 in words is "one trillion, six hundred sixty-six billion, four hundred fifty-seven million, four hundred twenty-three thousand, four hundred seventy".