77506745 has 8 divisors (see below), whose sum is σ = 93078720. Its totient is φ = 61958320.

The previous prime is 77506733. The next prime is 77506747. The reversal of 77506745 is 54760577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77506745 - 2⁴ = 77506729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77506747) 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, 2426 + ... + 12684.

It is an arithmetic number, because the mean of its divisors is an integer number (11634840).

Almost surely, 2^77506745 is an apocalyptic number.

It is an amenable number.

77506745 is a deficient number, since it is larger than the sum of its proper divisors (15571975).

77506745 is a wasteful number, since it uses less digits than its factorization.

77506745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11775.

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 77506745 is about 8803.7915127518. The cubic root of 77506745 is about 426.3633175672.

The spelling of 77506745 in words is "seventy-seven million, five hundred six thousand, seven hundred forty-five".