70566739 has 2 divisors, whose sum is σ = 70566740. Its totient is φ = 70566738.

The previous prime is 70566731. The next prime is 70566761. The reversal of 70566739 is 93766507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70566739 - 2³ = 70566731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70566695 and 70566704.

It is not a weakly prime, because it can be changed into another prime (70566731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35283369 + 35283370.

It is an arithmetic number, because the mean of its divisors is an integer number (35283370).

Almost surely, 2^70566739 is an apocalyptic number.

70566739 is a deficient number, since it is larger than the sum of its proper divisors (1).

70566739 is an equidigital number, since it uses as much as digits as its factorization.

70566739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 70566739 is about 8400.4011213751. The cubic root of 70566739 is about 413.2377765720.

The spelling of 70566739 in words is "seventy million, five hundred sixty-six thousand, seven hundred thirty-nine".