66477090 has 16 divisors (see below), whose sum is σ = 159545088. Its totient is φ = 17727216.

The previous prime is 66477083. The next prime is 66477091. The reversal of 66477090 is 9077466.

It is not an unprimeable number, because it can be changed into a prime (66477091) 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, 1107922 + ... + 1107981.

It is an arithmetic number, because the mean of its divisors is an integer number (9971568).

Almost surely, 2^66477090 is an apocalyptic number.

66477090 is an abundant number, since it is smaller than the sum of its proper divisors (93067998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66477090 is a wasteful number, since it uses less digits than its factorization.

66477090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215913.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66477090 is about 8153.3483919185. The cubic root of 66477090 is about 405.0954202845.

The spelling of 66477090 in words is "sixty-six million, four hundred seventy-seven thousand, ninety".