66754061 has 4 divisors (see below), whose sum is σ = 72822624. Its totient is φ = 60685500.

The previous prime is 66754057. The next prime is 66754081. The reversal of 66754061 is 16045766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66754061 - 2² = 66754057 is a prime.

It is a super-2 number, since 2×66754061² = 8912209319983442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66754021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3034265 + ... + 3034286.

It is an arithmetic number, because the mean of its divisors is an integer number (18205656).

Almost surely, 2^66754061 is an apocalyptic number.

It is an amenable number.

66754061 is a deficient number, since it is larger than the sum of its proper divisors (6068563).

66754061 is a wasteful number, since it uses less digits than its factorization.

66754061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6068562.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66754061 is about 8170.3158445681. The cubic root of 66754061 is about 405.6572390000.

The spelling of 66754061 in words is "sixty-six million, seven hundred fifty-four thousand, sixty-one".