72770057 has 4 divisors (see below), whose sum is σ = 76600080. Its totient is φ = 68940036.

The previous prime is 72770021. The next prime is 72770063. The reversal of 72770057 is 75007727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72770057 - 2⁶ = 72769993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72769999 and 72770026.

It is not an unprimeable number, because it can be changed into a prime (72776057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914983 + ... + 1915020.

It is an arithmetic number, because the mean of its divisors is an integer number (19150020).

Almost surely, 2^72770057 is an apocalyptic number.

It is an amenable number.

72770057 is a deficient number, since it is larger than the sum of its proper divisors (3830023).

72770057 is a wasteful number, since it uses less digits than its factorization.

72770057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830022.

The product of its (nonzero) digits is 24010, while the sum is 35.

The square root of 72770057 is about 8530.5367357512. The cubic root of 72770057 is about 417.4946408291.

Subtracting 72770057 from its reverse (75007727), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 72770057 in words is "seventy-two million, seven hundred seventy thousand, fifty-seven".