66161546 has 16 divisors (see below), whose sum is σ = 108578880. Its totient is φ = 29986080.

The previous prime is 66161531. The next prime is 66161551. The reversal of 66161546 is 64516166.

It is a super-2 number, since 2×66161546² = 8754700338220232, which contains 22 as substring.

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, 3710 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (6786180).

Almost surely, 2^66161546 is an apocalyptic number.

66161546 is a deficient number, since it is larger than the sum of its proper divisors (42417334).

66161546 is a wasteful number, since it uses less digits than its factorization.

66161546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749.

The product of its digits is 25920, while the sum is 35.

The square root of 66161546 is about 8133.9747971087. The cubic root of 66161546 is about 404.4534536953.

The spelling of 66161546 in words is "sixty-six million, one hundred sixty-one thousand, five hundred forty-six".