70766261 has 4 divisors (see below), whose sum is σ = 72412032. Its totient is φ = 69120492.

The previous prime is 70766243. The next prime is 70766281. The reversal of 70766261 is 16266707.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16266707 = 53 ⋅306919.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70766261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70766231) 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, 822821 + ... + 822906.

It is an arithmetic number, because the mean of its divisors is an integer number (18103008).

Almost surely, 2^70766261 is an apocalyptic number.

It is an amenable number.

70766261 is a deficient number, since it is larger than the sum of its proper divisors (1645771).

70766261 is a wasteful number, since it uses less digits than its factorization.

70766261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645770.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 70766261 is about 8412.2684812124. The cubic root of 70766261 is about 413.6268760431.

The spelling of 70766261 in words is "seventy million, seven hundred sixty-six thousand, two hundred sixty-one".