77770016 has 12 divisors (see below), whose sum is σ = 153109782. Its totient is φ = 38884992.

The previous prime is 77770013. The next prime is 77770051. The reversal of 77770016 is 61007777.

It can be written as a sum of positive squares in only one way, i.e., 46185616 + 31584400 = 6796^2 + 5620^2 .

It is not an unprimeable number, because it can be changed into a prime (77770013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215125 + ... + 1215188.

Almost surely, 2^77770016 is an apocalyptic number.

It is an amenable number.

77770016 is a deficient number, since it is larger than the sum of its proper divisors (75339766).

77770016 is a wasteful number, since it uses less digits than its factorization.

77770016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430323 (or 2430315 counting only the distinct ones).

The product of its (nonzero) digits is 14406, while the sum is 35.

The square root of 77770016 is about 8818.7309744657. The cubic root of 77770016 is about 426.8455218031.

The spelling of 77770016 in words is "seventy-seven million, seven hundred seventy thousand, sixteen".