77990606 has 16 divisors (see below), whose sum is σ = 121026048. Its totient is φ = 37654200.

The previous prime is 77990603. The next prime is 77990621. The reversal of 77990606 is 60609977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77990603) 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, 34301 + ... + 36503.

It is an arithmetic number, because the mean of its divisors is an integer number (7564128).

Almost surely, 2^77990606 is an apocalyptic number.

77990606 is a deficient number, since it is larger than the sum of its proper divisors (43035442).

77990606 is a wasteful number, since it uses less digits than its factorization.

77990606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 77990606 is about 8831.2290197911. The cubic root of 77990606 is about 427.2487147651.

The spelling of 77990606 in words is "seventy-seven million, nine hundred ninety thousand, six hundred six".