66155542 has 8 divisors (see below), whose sum is σ = 99295776. Its totient is φ = 33056952.

The previous prime is 66155539. The next prime is 66155597. The reversal of 66155542 is 24555166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66155498 and 66155507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6078 + ... + 13009.

It is an arithmetic number, because the mean of its divisors is an integer number (12411972).

Almost surely, 2^66155542 is an apocalyptic number.

66155542 is a deficient number, since it is larger than the sum of its proper divisors (33140234).

66155542 is a wasteful number, since it uses less digits than its factorization.

66155542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20822.

The product of its digits is 36000, while the sum is 34.

The square root of 66155542 is about 8133.6057194826. The cubic root of 66155542 is about 404.4412189349.

The spelling of 66155542 in words is "sixty-six million, one hundred fifty-five thousand, five hundred forty-two".