66477061 has 8 divisors (see below), whose sum is σ = 79277184. Its totient is φ = 54502800.

The previous prime is 66477043. The next prime is 66477083. The reversal of 66477061 is 16077466.

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

It is a cyclic number.

It is not a de Polignac number, because 66477061 - 2¹⁷ = 66345989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66477061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66477001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206290 + ... + 206611.

It is an arithmetic number, because the mean of its divisors is an integer number (9909648).

Almost surely, 2^66477061 is an apocalyptic number.

It is an amenable number.

66477061 is a deficient number, since it is larger than the sum of its proper divisors (12800123).

66477061 is a wasteful number, since it uses less digits than its factorization.

66477061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412931.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66477061 is about 8153.3466135079. The cubic root of 66477061 is about 405.0953613782.

The spelling of 66477061 in words is "sixty-six million, four hundred seventy-seven thousand, sixty-one".