77072745 has 8 divisors (see below), whose sum is σ = 123316416. Its totient is φ = 41105456.

The previous prime is 77072741. The next prime is 77072773. The reversal of 77072745 is 54727077.

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 77072745 - 2² = 77072741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77072741) 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, 2569077 + ... + 2569106.

It is an arithmetic number, because the mean of its divisors is an integer number (15414552).

Almost surely, 2^77072745 is an apocalyptic number.

It is an amenable number.

77072745 is a deficient number, since it is larger than the sum of its proper divisors (46243671).

77072745 is a wasteful number, since it uses less digits than its factorization.

77072745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138191.

The product of its (nonzero) digits is 96040, while the sum is 39.

The square root of 77072745 is about 8779.1084399271. The cubic root of 77072745 is about 425.5660186166.

The spelling of 77072745 in words is "seventy-seven million, seventy-two thousand, seven hundred forty-five".