66007061 has 4 divisors (see below), whose sum is σ = 66025824. Its totient is φ = 65988300.

The previous prime is 66007057. The next prime is 66007087. The reversal of 66007061 is 16070066.

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 66007061 - 2² = 66007057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66007061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66007031) 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, 2345 + ... + 11726.

It is an arithmetic number, because the mean of its divisors is an integer number (16506456).

Almost surely, 2^66007061 is an apocalyptic number.

66007061 is the 4691-st octagonal number.

It is an amenable number.

66007061 is a deficient number, since it is larger than the sum of its proper divisors (18763).

66007061 is a wasteful number, since it uses less digits than its factorization.

66007061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18762.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 66007061 is about 8124.4729675223. The cubic root of 66007061 is about 404.1384132633.

The spelling of 66007061 in words is "sixty-six million, seven thousand, sixty-one".