77490666 has 24 divisors (see below), whose sum is σ = 183160224. Its totient is φ = 23481960.

The previous prime is 77490661. The next prime is 77490667. The reversal of 77490666 is 66609477.

It is not an unprimeable number, because it can be changed into a prime (77490661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195486 + ... + 195881.

It is an arithmetic number, because the mean of its divisors is an integer number (7631676).

Almost surely, 2^77490666 is an apocalyptic number.

77490666 is an abundant number, since it is smaller than the sum of its proper divisors (105669558).

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

77490666 is a wasteful number, since it uses less digits than its factorization.

77490666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391386 (or 391383 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 77490666 is about 8802.8782792902. The cubic root of 77490666 is about 426.3338320908. Note that the first 3 decimals are identical.

The spelling of 77490666 in words is "seventy-seven million, four hundred ninety thousand, six hundred sixty-six".