166245669554 has 32 divisors (see below), whose sum is σ = 260172820992. Its totient is φ = 79579584000.

The previous prime is 166245669553. The next prime is 166245669559. The reversal of 166245669554 is 455966542661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166245669493 and 166245669502.

It is not an unprimeable number, because it can be changed into a prime (166245669553) 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, 21472124 + ... + 21479864.

It is an arithmetic number, because the mean of its divisors is an integer number (8130400656).

Almost surely, 2^166245669554 is an apocalyptic number.

166245669554 is a deficient number, since it is larger than the sum of its proper divisors (93927151438).

166245669554 is a wasteful number, since it uses less digits than its factorization.

166245669554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11442.

The product of its digits is 46656000, while the sum is 59.

The spelling of 166245669554 in words is "one hundred sixty-six billion, two hundred forty-five million, six hundred sixty-nine thousand, five hundred fifty-four".