978766051 has 4 divisors (see below), whose sum is σ = 978946704. Its totient is φ = 978585400.

The previous prime is 978766003. The next prime is 978766067. The reversal of 978766051 is 150667879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 978766051 - 2⁹ = 978765539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978765986 and 978766004.

It is not an unprimeable number, because it can be changed into a prime (978766001) 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, 81940 + ... + 93121.

It is an arithmetic number, because the mean of its divisors is an integer number (244736676).

Almost surely, 2^978766051 is an apocalyptic number.

978766051 is a deficient number, since it is larger than the sum of its proper divisors (180653).

978766051 is a wasteful number, since it uses less digits than its factorization.

978766051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180652.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 978766051 is about 31285.2369497180. The cubic root of 978766051 is about 992.8713196721.

The spelling of 978766051 in words is "nine hundred seventy-eight million, seven hundred sixty-six thousand, fifty-one".